PLAN B analog blog

Wow. That's quite impressive!

On Wed, Feb 6, 2008 at 4:00 PM, (i think you can figure that out)
<peter@buzzclick-music.com> wrote:
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> As the Model 23 Analog Shift Register nears design completion, I've
>  posted some sound samples to give you an idea why it's got us sort of
>  excited. Before I do, let me go into a few details on the things about
>  ASR's which I've personally found aggravating:
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>  A) Outputs do not track the input voltage, making driving them with a
>  keyboard problematic.
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>  B) Output taps not tracking one another so that a voltages vary as
>  they are passed down the line of outputs.
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>  C) Incoming clock causing a droop in held voltages at it's falling edge.
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>  I'm glad to say that the Model 23 does none of these things. As the
>  following sound samples indicate, four separate VCOs driven by the
>  (now) four outputs of the ASR track to the quantized input of an
>  envelope generator:
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>  http://www.ear-group.net/asr1.mp3
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>  Same patch, but slower, giving you a clear indication of the
>  uniformity of the voltages as they go down the line of outputs:
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>  http://www.ear-group.net/asr2.mp3
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>  Same patch, at even a slower pace:
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>  http://www.ear-group.net/asr3.mp3
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>  Having a little melodic fun, now with the four VCOs gated through a
>  Model 13:
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>  http://www.ear-group.net/asr4.mp3
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>  Screwing around with the update speed, this time with the M23 sampling
>  quantized random voltages via the Model 24 give the 'classic ASR' effect:
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>  http://www.ear-group.net/asr5.mp3
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>  Design Changes/Improvements:
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>  The M23 now has four independent outputs taps Clock distribution to the
> four S+H's is now performed by an Atmel 2051 microcontroller. The analog
> memory (the capacitors) are monolithic laser-trimmed semiconductor junction
> type. The added expense yields the resolution you're hearing while cutting
> down on the overall part
>  count.
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>  For more information of the M23, go here:
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>  http://www.ear-group.net/model_23.html
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>  We will be seeing these along with the other first wave of ELF devices
>  coming in the late Spring/Early Summer.
>
>  - P
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