[sdiy] Synthi AKS sequencer cloning possibilities - and musings on Ken Stone's Pedalboard Controller as the core of an arpeggiator/sequencer.

[Grant Richter]

I did it with a PSIM, and now that the board is done for the Computer  
Voltage Source, you could back them up to EEPROM.

A 1,024 length loop is no problem, the design I did uses 4 tracks of  
256 bytes each. for looping.

See the Yahoo news group:

http://launch.groups.yahoo.com/group/ComputerVoltageSources/messages? 
o=1&yguid=65269460

On Nov 16, 2007, at 1:23 PM, Fernando de Izuzquiza wrote:

> I loved to play that sequencer. A very smart design (in terms of  
> functionality I mean)
>
> It could be great to have available some sort of long memory with  
> plenty of resolution to record gestures and values, like in the AKS  
> (and without an actual computer)
>
> Maybe it can be done with a PIC?
>
> Fernando
>
>
>
> El 08/11/2007, a las 21:58, anthony escribió:
>
>> I can't remember if we've discussed this topic in depth or not so  
>> I'll cast again:
>>
>> I've looked at the schematic for the sequencer for the Synthi AKS  
>> and it is amazing. And it's sad that what looks like a critical  
>> component is horribly and finally obsolete. Has anyone ever  
>> thought of updating this design.
>>
>> I like the idea for an on-the-fly performance oriented sequencer.  
>> Knob twiddling is fun, but it would be great to be able to just  
>> punch a sequence in and go. I have a design germinating in my  
>> brain that revolves around Ken Stone's CGS Pedalboard/Minikeyboard  
>> controller, some latches, like maybe CD4044's and his CGS gate  
>> sequencer and some other bits to fit it all together. I first got  
>> the idea when I looked at the schematic for the CGS Pedalboard  
>> schematic - the way the CV in generated from the output of the  
>> 74C922 (or a 74C923 for a 20-note version...) with a R2R ladder  
>> like a D/A converter. I thought you could take that raw binary  
>> output and chug it through a chain of latches with their own R2R  
>> ladders, controlled by some sort of sequencer and it'd make a nice  
>> arpeggiator/sequencer.
>>
>> Doesn't this sound like a neat elegant aproach? It woldn't get a  
>> 256-step sequence, but 8 or 16 would be easy.
>>
>> I think both ideas have their merits.
>>
>> Oh but I were a rich man and I'd have my own Synthi AKS and I  
>> could play "On The Run" on my very own!
>>
>> cheers,
>> aa
>
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