Documentation, and how balanced audio cables work. 

I finally had a bit more time this morning to write a bit more in the A/V manual.  There’s lots of bits and pieces of documentation on board, but no comprehensive single getting started manual.  So I’m writing one, bring together bits and pieces from all over the place, sorting out what documentation there is, updating schematics, etc.

Anyway, here’s the rough version on the article I just wrote about how balanced sound cables work.  It’s pretty much my standard explanation of Balanced Audio, and aimed at people coming to A/V from a non-techy musical background, rather than for Electronics Engineers.
You may find it interesting.  Then again, you may not.

—–

Sound is basically vibrations in the air.
TODO: more details, pingpong ball analogy? 
Inside an (SM57) Microphone head.
That is the bit of plastic and the coils!

This translates really easily into an analogue electrical signal: you simply turn the air vibrations into voltage vibrations.  A Dynamic microphone does this by having a small bit of paper (or plastic) which vibrates with the air around it, and pushes against a very small copper coil which, moving inside a magnetic coil itself, generates a very-very-very small amount of electrical current.

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  <span style="background-color: yellow;">&nbsp;TODO: more pictures.</span>
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  This gets dumped down a wire, which gets amplified by (you guessed it) an amplifier into a very big amount of electrical current, which then drives a big electromagnet inside a speaker, which pushes another copper coil around, which is attached to another big bit of paper (the speaker cone), which causes the air around the speaker to vibrate – with the same vibrations that the microphone vibrated with, just bigger.
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  Simple, isn’t it? (well. Kind of.)
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  <h3>
    <a href="http://www.blogger.com/blogger.g?blogID=13848483" name="_Toc348002284">Balanced Audio Cabling</a>
  </h3>

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    <h3>
      <span style="font-size: small;"><span style="font-weight: normal;">The trouble with simply dumping an audio signal down a cable, and picking it up at the other end is that your signal line, and return (usually ground) will pick up noise (say from A/C mains electricity, fluorescent lights, dimmers, mobile phones, etc) &nbsp;along the way.</span></span>
    </h3>

    <h3>
      <span style="font-size: small;"><span style="font-weight: normal;">Here’s an original signal:</span></span>
    </h3>

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    </h3>

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        <a href="http://blog.madprof.net/wp-content/uploads/2013/02/01-Original-Signal.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="99" src="http://blog.madprof.net/wp-content/uploads/2013/02/01-Original-Signal-300x94.png" width="320" /></a>
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UnhideWhenUsed="false" Name="Medium Shading 1"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 1"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 1"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 1"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 1"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 1"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 1"/>  <w:LsdException Locked="false" UnhideWhenUsed="false" Name="Revision"/>  <w:LsdException Locked="false" Priority="34" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="List Paragraph"/>  <w:LsdException Locked="false" Priority="29" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Quote"/>  <w:LsdException Locked="false" Priority="30" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Intense Quote"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 1"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 1"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 1"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 1"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List Accent 1"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading Accent 1"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List Accent 1"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid Accent 1"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 2"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 2"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 2"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 2"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 2"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 2"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 2"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 2"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 2"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 2"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List Accent 2"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading Accent 2"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List Accent 2"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid Accent 2"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 3"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 3"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 3"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 3"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 3"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 3"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 3"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 3"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 3"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 3"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List Accent 3"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading Accent 3"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List Accent 3"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid Accent 3"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 4"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 4"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 4"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 4"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 4"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 4"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 4"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 4"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 4"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 4"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List Accent 4"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading Accent 4"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List Accent 4"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid Accent 4"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 5"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 5"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 5"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 5"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 5"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 5"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 5"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 5"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 5"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 5"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List Accent 5"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading Accent 5"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List Accent 5"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid Accent 5"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 6"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 6"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 6"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 6"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 6"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 6"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 6"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 6"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 6"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 6"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List Accent 6"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading Accent 6"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List Accent 6"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid Accent 6"/>  <w:LsdException Locked="false" Priority="19" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Subtle Emphasis"/>  <w:LsdException Locked="false" Priority="21" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Intense Emphasis"/>  <w:LsdException Locked="false" Priority="31" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Subtle Reference"/>  <w:LsdException Locked="false" Priority="32" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Intense Reference"/>  <w:LsdException Locked="false" Priority="33" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Book Title"/>  <w:LsdException Locked="false" Priority="37" Name="Bibliography"/>  <w:LsdException Locked="false" Priority="39" QFormat="true" Name="TOC Heading"/> </w:LatentStyles></xml><![endif]-->

        <!--[if gte mso 10]><![endif]-->

        <div align="center" style="text-align: center;">
          And here’s some noise:
        </div>

        <p>
          &nbsp;
        </p>

        <div style="clear: both; text-align: center;">
        </div>

        <div style="clear: both; text-align: center;">
          <a href="http://blog.madprof.net/wp-content/uploads/2013/02/03-Noise.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="24" src="http://blog.madprof.net/wp-content/uploads/2013/02/03-Noise-300x23.png" width="320" /></a>
        </div>

        <div style="text-align: center;">
          &nbsp;And the result:<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings>  <o:AllowPNG/> </o:OfficeDocumentSettings></xml><![endif]-->
        </div>

        <p>
          <!--[if gte mso 9]><xml> <w:WordDocument>  <w:View>Normal</w:View>  <w:Zoom>0</w:Zoom>  <w:TrackMoves/>  <w:TrackFormatting/>  <w:PunctuationKerning/>  <w:ValidateAgainstSchemas/>  <w:SaveIfXMLInval>false</w:SaveIfXMLInvalid>  <w:IgnoreMixedContent>false</w:IgnoreMixedContent>  <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText>  <w:DoNotPromoteQF/>  <w:LidThemeOther>EN-GB</w:LidThemeOther>  <w:LidThemeAsian>KO</w:LidThemeAsian>  <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript>  <w:Compatibility>   <w:BreakWrappedTables/>   <w:SnapToGridInCell/>   <w:WrapTextWithPunct/>   <w:UseAsianBreakRules/>   <w:DontGrowAutofit/>   <w:SplitPgBreakAndParaMark/>   <w:EnableOpenTypeKerning/>   <w:DontFlipMirrorIndents/>   <w:OverrideTableStyleHps/>   <w:UseFELayout/>  </w:Compatibility>  <m:mathPr>   <m:mathFont m:val="Cambria Math"/>   <m:brkBin m:val="before"/>   <m:brkBinSub m:val="&#45;-"/>   <m:smallFrac m:val="off"/>   <m:dispDef/>   <m:lMargin m:val="0"/>   <m:rMargin m:val="0"/>   <m:defJc m:val="centerGroup"/>   <m:wrapIndent m:val="1440"/>   <m:intLim m:val="subSup"/>   <m:naryLim m:val="undOvr"/>  </m:mathPr></w:WordDocument></xml><![endif]-->

          <!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" DefUnhideWhenUsed="true"   DefSemiHidden="true" DefQFormat="false" DefPriority="99"   LatentStyleCount="267">  <w:LsdException Locked="false" Priority="0" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Normal"/>  <w:LsdException Locked="false" Priority="9" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="heading 1"/>  <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 2"/>  <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 3"/>  <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 4"/>  <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 5"/>  <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 6"/>  <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 7"/>  <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 8"/>  <w:LsdException 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Name="Subtitle"/>  <w:LsdException Locked="false" Priority="22" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Strong"/>  <w:LsdException Locked="false" Priority="20" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Emphasis"/>  <w:LsdException Locked="false" Priority="59" SemiHidden="false"    UnhideWhenUsed="false" Name="Table Grid"/>  <w:LsdException Locked="false" UnhideWhenUsed="false" Name="Placeholder Text"/>  <w:LsdException Locked="false" Priority="1" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="No Spacing"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 1"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 1"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 1"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 1"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 1"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 1"/>  <w:LsdException Locked="false" UnhideWhenUsed="false" Name="Revision"/>  <w:LsdException Locked="false" Priority="34" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="List Paragraph"/>  <w:LsdException Locked="false" Priority="29" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Quote"/>  <w:LsdException Locked="false" Priority="30" SemiHidden="false"    UnhideWhenUsed="false" QFormat="true" Name="Intense Quote"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 1"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 1"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 1"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 1"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List 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          <!--[if gte mso 10]><![endif]-->

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            </div>

            <div align="center" style="text-align: center;">
              This is a Bad Thing™.
            </div>

            <div align="center" style="text-align: center;">
            </div>

            <div style="text-align: left;">
              So some clever engineers, back in the deep recesses of time figured out the following:<span style="mso-spacerun: yes;">&nbsp; </span>You could take a signal, and before sending down the wire where it could pick up noise, invert it:
            </div>

            <div style="clear: both; text-align: center;">
              <a href="http://blog.madprof.net/wp-content/uploads/2013/02/02-Signal-and-Inverse.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="118" src="http://blog.madprof.net/wp-content/uploads/2013/02/02-Signal-and-Inverse-300x111.png" width="320" /></a>
            </div>

            <div style="clear: both; text-align: center;">
            </div>

            <p>
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              <div>
                If we add the signal to the inverse, you get a grand result of nothing (e.g. -3 + 3 = 0).
              </div>

              <div>
              </div>

              <div>
                Now, if we throw these two signals down a pair of very similar cables twisted round and round each other like crazy, then they’ll both pick up noise pretty much the same as each other:
              </div>

              <p>
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                <div style="clear: both; text-align: center;">
                  <a href="http://blog.madprof.net/wp-content/uploads/2013/02/04-Noisy-Signal-And-Inverse.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="140" src="http://blog.madprof.net/wp-content/uploads/2013/02/04-Noisy-Signal-And-Inverse-300x131.png" width="320" /></a>
                </div>

                <p>
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                  <!--[if gte mso 10]><![endif]-->

                  <div align="center" style="text-align: center;">
                    Note that 3 (the original) + 1 noise = 4,<br />while -3 (the inverse) + 1 noise = -2. NOT -4!
                  </div>

                  <div align="center" style="text-align: center;">
                  </div>

                  <div>
                    This is really cool, because if we add these two signals together, we don’t get 0 anymore, we get no original signal, but you do get the noise (doubled).
                  </div>

                  <p>
                    &nbsp;
                  </p>

                  <p>
                    <div style="clear: both; text-align: center;">
                      <a href="http://blog.madprof.net/wp-content/uploads/2013/02/06-Doubled-Noise.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="41" src="http://blog.madprof.net/wp-content/uploads/2013/02/06-Doubled-Noise-300x39.png" width="320" /></a>
                    </div>

                    <p>
                      <div>
                      </div>

                      <div>
                        So we’ll use our amazing maths skills again, and divide this doubled noise in half. (2/2 = 1).
                      </div>

                      <p>
                        <div style="clear: both; text-align: center;">
                          <a href="http://blog.madprof.net/wp-content/uploads/2013/02/03-Noise.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="24" src="http://blog.madprof.net/wp-content/uploads/2013/02/03-Noise-300x23.png" width="320" /></a>
                        </div>

                        <p>
                          <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings>  <o:AllowPNG/> </o:OfficeDocumentSettings></xml><![endif]-->

                          <div>
                            And we can subtract this 1 noise from the noisy original signal (4-1=3)
                          </div>

                          <div style="clear: both; text-align: center;">
                            <a href="http://blog.madprof.net/wp-content/uploads/2013/02/05-Noisy-Signal.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="120" src="http://blog.madprof.net/wp-content/uploads/2013/02/05-Noisy-Signal-300x113.png" width="320" /></a>
                          </div>

                          <p>
                            <div>
                              Voila! The original clean signal is back again.
                            </div>

                            <p>
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                              <!--[if gte mso 10]><![endif]-->

                              <div style="clear: both; text-align: center;">
                                <a href="http://blog.madprof.net/wp-content/uploads/2013/02/01-Original-Signal.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="99" src="http://blog.madprof.net/wp-content/uploads/2013/02/01-Original-Signal-300x94.png" width="320" /></a>
                              </div>

                              <p>
                                &nbsp;<span style="font-size: small;"><span style="font-family: inherit;"> <span style="line-height: 115%;">This is (roughly speaking) how balanced audio works.&nbsp; And since almost all professional audio equipment runs with balanced circuitry, all we need to do is make sure the cables are in good shape, and then everything works magically with hardly any noise.</span></span></span> 

                                <div>
                                </div>

                                <div>
                                </div>

                                <div>
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Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 3"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 3"/>  <w:LsdException Locked="false" Priority="69" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 3 Accent 3"/>  <w:LsdException Locked="false" Priority="70" SemiHidden="false"    UnhideWhenUsed="false" Name="Dark List Accent 3"/>  <w:LsdException Locked="false" Priority="71" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Shading Accent 3"/>  <w:LsdException Locked="false" Priority="72" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful List Accent 3"/>  <w:LsdException Locked="false" Priority="73" SemiHidden="false"    UnhideWhenUsed="false" Name="Colorful Grid Accent 3"/>  <w:LsdException Locked="false" Priority="60" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Shading Accent 4"/>  <w:LsdException Locked="false" Priority="61" SemiHidden="false"    UnhideWhenUsed="false" Name="Light List Accent 4"/>  <w:LsdException Locked="false" Priority="62" SemiHidden="false"    UnhideWhenUsed="false" Name="Light Grid Accent 4"/>  <w:LsdException Locked="false" Priority="63" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 1 Accent 4"/>  <w:LsdException Locked="false" Priority="64" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Shading 2 Accent 4"/>  <w:LsdException Locked="false" Priority="65" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 1 Accent 4"/>  <w:LsdException Locked="false" Priority="66" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium List 2 Accent 4"/>  <w:LsdException Locked="false" Priority="67" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 1 Accent 4"/>  <w:LsdException Locked="false" Priority="68" SemiHidden="false"    UnhideWhenUsed="false" Name="Medium Grid 2 Accent 4"/>  <w:LsdException Locked="false" Priority="69" 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                                  <!--[if gte mso 10]><![endif]-->
                                </div>

                                <div>
                                  <span style="font-size: small;"><span style="font-family: inherit;">This is why for balanced cables (XLR/Mic, or TRS jack) you have 3 pins: +, -, and ground.&nbsp; The ground is connected to a wire-mesh sheath around the other two, to try and keep as much noise away as possible.</span></span>
                                </div>

                                <div>
                                </div>

                                <div>
                                  <i style="mso-bidi-font-style: normal;">(Technically, you don’t <b style="mso-bidi-font-weight: normal;">need</b> to invert the signal, you could just use an empty zero, but for various impedance, op-amp, techy reasons, it works better if you do.)</i>
                                </div>

                                <div>
                                </div>

                                <div>
                                  Sometimes the ground wire will pick up noise itself, or due to being connected to different grounds at both ends of the circuit (say a piano on stage, and the A/V room sound desk) it will end up with a bit of random leaked current running down itself.<span style="mso-spacerun: yes;">&nbsp; </span>This can show up as noise, so you often use a Ground-Lift switch to disconnect the ground at one end or the other, which can sometimes help.
                                </div>

                                <div>
                                  A DI box takes an unbalanced signal, and turns it into a balanced one, which means you can send a signal a long way without noise.
                                </div>

                                <div>
                                </div>

                                <div>
                                  Remember how the two wires have to be twisted together like crazy?<span style="mso-spacerun: yes;">&nbsp; </span>This is so that if there is some noisy thing (like a flurescent light) nearby, both wires will be equally effected.<span style="mso-spacerun: yes;">&nbsp; </span>This is so important, that for broadcast audio, sometimes cables with 4 or more wires are used.<span style="mso-spacerun: yes;">&nbsp; </span>The + signal on 1 & 3, the – signal on 2 and 4, and then all of these are twisted together.<span style="mso-spacerun: yes;">&nbsp; </span>There are brand names of these cables such as QuadStar, etc.<span style="mso-spacerun: yes;">&nbsp; </span>Usually this is somewhat overkill for regular live sound though, as the cabling is much stiffer and harder to use day to day.
                                </div>

                                <p>
                                  <div>
                                  </div>

                                  <div>
                                    &#8212;&#8212;&#8211;
                                  </div>

                                  <div>
                                  </div>

                                  <div>
                                    So, what do you think?
                                  </div>
2013

A random side story. 

HK-SITREP-042.2013.01.10:

An individual with an extremely large head has been seen, dressed in a captains uniform walking around the vicinity of the Hong Kong International Airport.  He seems reasonably calm, although the fixed smile on his face is somewhat disturbing.  We believe he is waiting for some one, or ones, to arrive from destinations unknown.

Please advise.

Plenty of people coming off the plane were very confused.  Still, pretty fun for us.  I was the one with the camera, not the one in the suit, in case you’re wondering.
I think we may have slightly freaked out the bus driver on the way as well…

(Yes, we were picking up friends from the airport.  No, they didn’t know we were going to bring the Captain.  Yes, it was funny.)

2013

 

So we’ve been on board the Logos Hope for just over a week now.

Kind of hard to believe.  I really should have blogged earlier, saying we’ve arrived, etc.

As well as jet-lag, I picked up a cold, I guess on the plane, so have been totally energyless and wanting to just crash in the evenings rather than do something productive like write.

Sorry.

Anyway.  Logos Hope is a much bigger ship than Doulos.  I’ll try an post comparison pictures at some point.

The A/V systems on board are also quite a bit more complex and bigger.  Similar concepts, and designed by OMNIvision guys, so using equipment I’m either familiar with, or familiar with cousins of.  (I’d never mixed with an LS9, for instance, which is the digital sound desk they have on board – but I know the O1V96, which is kind of similar, and other digital sound desks).

So, we hadn’t quite realised that the ship is still in ‘drydock’ mode, so not really open to the public, wooden boards and paper over much of the carpeting, etc.

The Hope Theatre, the amazing on board venue which they have (*so* much bigger and cooler than Doulos tiny ‘Main Lounge’ had been converted into a mess for the deckies and engine guys, as well as workshop, storage area, dressing room, and general chaos zone. 

Because the Dry-dock had been extended so many times, and they’d thought that initially it would be very short, much of the equipment (lights, sound desk, projectors, etc) didn’t get taken down and covered properly pre-drydock.  So one job we’ve been doing over the last week is cleaning out the lights and projectors as much as we can, and covering them all with plastic bags so that during the cleaning of the rest of the theatre they don’t get any more dusty and dirty.

(We expect a lot more dust to come up when they lift up the floor covering boards and clean up the mess).

It’s pretty funny, seeing so many little bits of Doulos scattered around, like this ‘world’ guitar.

A lot of the equipment is slightly damaged, or very confused.

Like these poor headphones.  A lot of the settings of equipment are set to really weird settings, some of which seem to have been reset to factory settings.  Apparently over drydock a lot of equipment has been un airconditioned for 6 months or so, some of which has been off for that long, some of which has actually been used in that humid dirty state.  I guess that accounts for some of it.

But there are also jobs which have been listed as ‘fixed’ by the previous A/V manager but are obviously done wrong.  It’s kind of irritating.  Apparently there has been very little hand over between managers for a while.  Very little sensible training, and huge amounts of knowledge have been lost.

There really is a vast ammount of work to be done, just to get the systems operational and ready for normal ministry again.  Let alone the teaching side of things.

None of the A/V team really have a lot of experience with running A/V systems, or any theoretical background in what equipment does, or how ‘good’ A/V should look.

They do a lot of stuff by ‘if you press this button, it should work’.  Without really understanding what the button does, or why, or how to trouble shoot it if it doesn’t.

There is one guy who does know a bit more about it all, he’s been on break for a while so I only just met him last night.  He’s been the one basically running stuff for the last few months, but he doesn’t have a huge amount of experience either, (although has been doing an amazing job managing to keep anything going at all).

The team is great though, and really excited to learn more and understand it.

Anyway.  I’ll post more updates later.

2012

Déjà vu 

So Becky and I have been trying to go back to the ship for a while now.

Not the Doulos, but the Logos Hope.

Somehow, I just don’t seem to have got it out of our blood yet.

We though about going out late January time, perhaps flying with the new recruits from the January Conference.

So, the Déjà vu thing…

We spoke to some people in August at the GO conference, sent some emails around, waited a bit.

Waited some more.  As one does.

Anyway, we got an email last week from our friend Mark, who’s one of the big manager types.

“I’ve spoken to the guys on board. I don’t suppose you could come at the end of the month, could you? I know it’s a bit short notice…”

!!

(Those previous two exclamation points without corresponding lexical complication are in fact, grammatically correct. ‘Self-explanatory punctuation’ I call it.)

_ _So it looks like we may be back on board in 3 weeks!  Quite exciting, and a perfect excuse to start up this blog again.

Why the ‘deja vu’ comment? Well, it seems awfully reminiscent of my first short term ship back in 2005.  Feel free to find the archive entries if you wish!

The Logos Hope is just coming out of a very long (9 months odd) layup/drydock, and so they’d really like a couple of extra pairs of hands to help in the programmes/events/Audio-Visual stuff sooner rather than later.

More details to come later. 🙂

2012

2 weeks in Cyprus 

So Becky and I came over to Cyprus for a couple of weeks.  The last time we visited was almost 2 years ago, so this is our first time here as a married couple.

It’s relaxing, and interesting, and fun, and weird being back in Cyprus.  A few things have changed, many people come and go, which is usual…

We’ve been catching up with loads of people from the local church (various congregations), been sailing with my dad twice, been to a performance at theatre antidote, looked at their lighting system and helped look at the audio stuff they have, played loads of Settlers of Catan & Ticket to Ride with my parents and their usual Catan-Cronies (hi guys! Hope you like your new title…), we visited Nicosia, and went across (briefly) to the North, spent time with the cats (me being somewhat cat-starved), went for walks by the salt-lake, I bought a Cyprus coffee maker, and some other bits of (tasteful) Cypriotness.  Partly because I like Cyprus coffee, and partly because I hope we’ll be heading back towards the ship(s) at some point, and would like to have some stuff from the country to show people.

I can’t figure out how to make the webcam take pictures (I’m writing on mum’s chromebook) so you’ll just have to wait for photos of the coffee maker.

Anyway. (I can’t write a blogpost without at least one paragraph starting with ‘Anyway’.) We’re off to the UK again in a couple days, which will be odd again.

As I mentioned, briefly, we are looking at heading back towards the ship(s) at some point.  Probably for a few months at the end of the year, if we can, and see if maybe we should be going out there for a few years again at some point – when, we don’t know.

I’m looking forward to seeing our friends in the UK again soon,  but not really looking forward to the weather, or work, to be honest.  Seeing live theatre stuff again… I miss it a lot.  And being at sea, even if it is on a little boat.  And warm weather, even if not that warm.    OMNIvision is doing some cool stuff, and the team is amazing, and I’m glad to be part of it.  But documentary-type video production, media-engineering and web development are kind of interesting, but not really exciting any more for me.

Thinking that next week I’ll probably be fixing broken mic cables and fighting stupid Internet Explorer broken-ness makes me very gloomy.

Still.  I’m in Cyprus now, spent the day sailing with my wife, my dad, currently I have a cat purring on my lap, about to play a game of Settlers, and go out for a meal this evening with some old friends, so, I really shouldn’t complain!  This has been a really good fortnight.

2012

Techy post 

I appologise for how techy and geeky and boring this post is.

I even find it so myself.

But I need to get this off my chest, so I can actually write about interesting stuff later…

And some geeky people may actually find something comprehensible in here.  Perhaps even interesting.

If you want to read it, then if your eyes glaze over with techiness, then stop reading, drink a glass of water, scroll down to ‘And another thing‘, and read from there.

So then.

Most of my recent work has been on the omnitube.org website.

It’s a site I put together with David when I visited OMNIvision 4 years ago (now that seems weird!).  We put it together in about 2 weeks, based on a well known large complex CMS (Content Management System) called Joomla, which was the OM standard web-site-software-package, a few very large complex modules for that, specifically “VirtueMart”, plus a bunch of my own hacks in php/javascript, plus a load of very clever HTML/CSS from David.  Since then, I’d done a few fixes for them, logging on from a ‘net cafe in Singapore, and when Becky and I arrived at OMNIvision 2 years ago, it was basically in the same state.

The trouble was that in the 2 years since we’d put it together, the internet had changed quite a lot, and we hadn’t had the time to really work on OMNItube to change with it.  Joomla had advanced significantly, as had Virtuemart, and alas, we couldn’t smoothly upgrade to the latest versions of those without majorly breaking everything.

About a year ago (from now), I decided it was about time to do something about this, as I was scared that a now 3 year old install of joomla/etc without being able to have security updates was a bit scary.  Especially as we wanted to sell videos online, and DVDs, and so were doing credit-card type security stuff.  And the system admin wanted to upgrade the server, and I thought doing that would probably break everything again.

I spent about a week trying to upgrade things to the latest versions of joomla and virtuemart.  Some bits I got almost close to working, but in the end it just totally bogged me down.  Joomla + Virtuemart + all the plugins and modules which were installed to make everything work as we wanted ended up at around 7000+ files, and 800’000 lines of code.  Not joking.  So tracking down bugs and errors and trying even to find which function I was looking for took forever, and I simply don’t have a big enough brain to hold that much in my head at once.

So after a week or two of working hard to try and upgrade things, I gave up, it was just too big a job for me to do on my own.  I’d made no progress, and it was still a big stinkin’ mess.

We also had some new features we wanted to get working. Specifically, iTunes subscriptions, XML sitemap, facebook commenting/liking/etc, and related product lists.  The “search” system was also very broken, giving pretty much useless results most of the time.

I’d just read an article online about making stuff simpler, ‘the no-framework framework’ or something like that.  And looking at the SQL database, I figured I could write the iTunes and sitemap features we wanted in just pure basic php.  So I did.  It took about 3 days, which was pretty good, I thought, considering I’d not really done significant amounts of programming in about 4 years.

So then – perhaps alas? – I thought, well, why not re-write the whole of OMNItube in a similar manner?  I mean, how hard can it be?  It’s a very simple website, after all….

In 2 weeks after that, I’d put together a quick ‘demo’ of the site, which took it’s data from the joomla database, had all the basic functionality of the front end,  but in 700 lines of code, TOTAL.  No Joomla, No Virtuemart, nothing.

OK, so it was only the front end, if you wanted to actually add a new video or something you needed to edit the database manually, rather than use the horrendously over-complex somewhat-broken-by-our-CSS-mods joomla back-end, but hey!

700 lines of code is something I can hold in my head, no problem.  Way better than 800 thousand!

So anyway, that’s been the big project for me, over the last year.  It’s taken me 3 re-writes, which is what took so long.  I really should have spent a lot longer learning stuff and looking at alternatives before launching in to it as I did…

I first wrote it doing all the SQL in-line, sort of saying “I need a list of the products, so the SQL for that is SELECT…blah.blah.blah” and so writing it then and there.  Which works for very simple stuff.  But I began to find patterns, of course, and so wrote functions and classes to abstract stuff out, which was good!  But each time I did something like that, it meant re-factoring and writing stuff I’d already done, to make use of the new abstract methods I was coming up with.

Eventually, though, it was all working, pretty much.

 I slowly switched over bits of the live system to my new creation over time,  so the video embedding system was first, then the iTunes feeds, then the front end, eventually, and finally I was able to delete the joomla system, and run entirely on my much smaller simpler pure-php non-frameworked version.  I guess about 6 to 8 months ago?

So after the crazy summer, I did a bit of cleaning up, backups, version-management, etc, And a guy called Chris came to work with us, who is interested in doing web / programming stuff.   So I chatted with him, showed him OMNItube, as it was then, and told him about my future plans.

I’d found a cool looking database library for PHP called ‘Propel‘, which did much of the grunt work of doing SQL database querying instead of us having to do it.  I thought it looked cool, and would save us a lot of work in the future, and so Chris started work on porting OMNItube over to using Propel.  He also figured out a bunch of stupid stuff I’d been doing before, and found much better, simpler ways to do it.  Templating things, for the big example.

In some ways, I’d not really wanted to be working on any more OMNItube stuff for a while though.. I kind of thought ‘it’s working, I should probably just leave it until next year or something’.  But then after Chris left, I wanted to get his project all merged in to the main system, and not leave things in a mixed state, with 2 versions, his almost-done version, and the online-one with changes to it that I’d needed to make since he started….

Anyway.  I’ve spent the last few weeks hacking hard at OMNItube, until now it’s stable and running well using the new Propel based system.  It’s much simpler, much better, the administration/back-end thing is very cool, and generally just works great.

The whole thing is now 7000 lines of PHP, plus a few hundred of javascript and html, but still, that’s quite manageable, and I’m reasonably happy with it.  I’ve even open-sourced one of the smaller more generic bits of the system, and plan to put a few more modules online too, in the hope other people can find them useful in the future.

I’ve learned a lot, during this project.  I understand from experience a load of programming concepts a lot better than I used to before.  I’ve learned quite how much I dislike PHP, for one thing.  It really is a botch on top of a hack on top of a temporary way to fix a problem.  If I were starting the project now, I think I would pick a cleaner, simpler, better language.  Possibly ruby, python, LISP, javascript, perl5, or even haskell.

[Another thing][2] though, I’m really bored of web development.  It’s so much effort, and in the end, all you’re left with is a bunch of patterns of pixels on a screen.

I SO miss acting, theatre, drama, etc.

And the trouble is, after a day fighting with programming problems, I don’t then feel capable of doing anything creative.  It’s like my brain has just given up, as has my emotional capacity to care about creativity.  All I want to do is crash, which isn’t very nice for Becky, nor very helpful in building relationships, in staying up to date with anything actually interesting, or in keeping in practice with Clarinet or juggling or writing plays or whatever else I’d prefer, if I were less frustrated and computered-out to actually do.

Writing, for instance.  When I’ve been writing code, or trying to write code all day, I have no ability to write on this blog, say.  Or write newletters, or emails, letters, or even SMSs.

I’ve not really touched OMNItube now in about a week, which is why I’m able to write this post… but even still, I’m not quite able to break my brain out of that mould enough to write about anything interesting… all I can do is write about writing code.

Which I guess is a step in the right direction.

I’ll write a more general, non-techy post soon

[2]: http://www.blogger.com/blogger.g?blogID=13848483

2011

Intro Post 

Dear Internet,

You’ve been such a help in me finding stuff, random answers to obscure questions, that I should also submit random answers I’ve found out myself, so others can find them.

This is it.

I’m not good with computers!  Honest I’m not!

2011

There is a reason… 

There is a reason why I prefer text based / commandline / unix interfaces.

“Why?” You may ask?

So I had to update a website – basically changing from ‘2011’ to ‘2012’ – for someone.  Once I got in to the file manager (web based) I could find the graphics files to replace, reasonably easily, and upload new ones.

But I needed to update the text of the banner.  No .html files, or .inc or anything to edit.

So I went to the “WYSIWYG” editor section of the site.  I could edit everything, except that part.  And the footer.  And the page title. So, I could edit the “articles”, but not much else.

After hunting around for a while, I decided to try the “Website Management” area.  Total different interface again, loads of settings boxes and tabs.  I found there on different pages where I could set the page title, and so on.  But I couldn’t find the banner! Anywhere!

Eventually, this morning, I found it.

In “Website Management” -> “Structure” -> “Website Settings” -> “Code Injection” -> “Advanced” -> “Site Banner HTML Override — Edited”

I hadn’t found it before, because the section I needed was “Site Banner HTML Override”, and to find that, I needed to look through a drop-down box which was displaying “Extra Header Code (within )” with some javascript includes.

SERIOUSLY.

What is wrong with just having a bunch of text files, and then letting me type

“grep 2011 *”

And it giving me a list of files to edit?  HOW is this graphical interface any easier?

OK.  So ‘grep’ isn’t common English, I know.  Learning basic unix does have a steep looking learning curve.  At first.

In case you’re interested, I started, months and months ago, writing an “English-like” command shell.

So you could type commands like:

“list all files which contain 2011”

and it should tell you.

It’s on sourceforge, the first alpha versions of the code.
[There is a reason why I prefer text based / commandline / unix interfaces.

“Why?” You may ask?

So I had to update a website – basically changing from ‘2011’ to ‘2012’ – for someone.  Once I got in to the file manager (web based) I could find the graphics files to replace, reasonably easily, and upload new ones.

But I needed to update the text of the banner.  No .html files, or .inc or anything to edit.

So I went to the “WYSIWYG” editor section of the site.  I could edit everything, except that part.  And the footer.  And the page title. So, I could edit the “articles”, but not much else.

After hunting around for a while, I decided to try the “Website Management” area.  Total different interface again, loads of settings boxes and tabs.  I found there on different pages where I could set the page title, and so on.  But I couldn’t find the banner! Anywhere!

Eventually, this morning, I found it.

In “Website Management” -> “Structure” -> “Website Settings” -> “Code Injection” -> “Advanced” -> “Site Banner HTML Override — Edited”

I hadn’t found it before, because the section I needed was “Site Banner HTML Override”, and to find that, I needed to look through a drop-down box which was displaying “Extra Header Code (within )” with some javascript includes.

SERIOUSLY.

What is wrong with just having a bunch of text files, and then letting me type

“grep 2011 *”

And it giving me a list of files to edit?  HOW is this graphical interface any easier?

OK.  So ‘grep’ isn’t common English, I know.  Learning basic unix does have a steep looking learning curve.  At first.

In case you’re interested, I started, months and months ago, writing an “English-like” command shell.

So you could type commands like:

“list all files which contain 2011”

and it should tell you.

It’s on sourceforge, the first alpha versions of the code.
][1]
http://sourceforge.net/projects/daftshell/

The whole idea of ‘natural language’ interfaces fascinates me.  I should work on daftshell again, one of these days.

So. Yeah.  Graphical “easy” systems aren’t always easy.

[1]: http://www.blogger.com/goog_1739586617

2011

Windows Movie Maker 

I wrote this a few months ago in a prayer meeting.  I know.  Very holy of me.

Windows Movie Maker [C:Program FilesMovie MakerMOVIEMK.exe] is a highly virulent productivity virus.  Not only effecting the computer it is hosted on, but having a socially engineered payload which self-propagates through USB sticks, video/data projectors, and various presentation media.

Reports have come in of this virus’ unique capability to be transmitted through analogue forms such as VHS tape, and occasionally film.

Symptoms:

Response Actions:

[small print.  Dear lawyers, et al.  This is what’s known as parody.  Just like the word ‘Movie’ is in the program title.  In other words, a joke.]

2011

Beauty in the eye of the beholder? 

“Beauty is in the eye of the beholder”… or is it?

By saying it is, we say beauty is only a subjective quality.

But by saying it isn’t – by saying that something may be beautiful without our being able to appreciate it as beautiful – we divorce ourselves from our experience and our association between words and description…

Is it possible to say

“It’s beautiful, but I don’t like it.”

Which I think I may have said, from time to time. In that I can see elements and aspects which, maybe I know, are considered beautiful, or perhaps I can see an underlying elegance and purpose, but aesthetically I find it displeasing… Some of Rembrant’s paintings would fall in to this category.

The thing is, am I just susceptible to the cultural conditioning of my upbringing in saying something like this? I have preconceived notions of what is beautiful and what isn’t? But then, my aesthetic sense is also formed (to a large degree) by the same…

So there’s a whole philosophic field based around these very questions.

But I guess I’m kind of wondering… how variable language is. How our thoughts are modified by the language and words we use, and yet the language and words we use are modified and morphed by our thoughts.

So often, everything seems so vague, so fuzzy, so indefinable, so inexplicable, so possibly variable, so uncertain and indefinate, and so futile. sigh

2011