[sdiy] My 12 x Moog 921B VCO clones finaly built...

[Mike Pepper]

> On May 26, 2012, at 4:10 PM, Ian Fritz wrote:
>
>> At 01:55 PM 5/26/2012, Gordon JC Pearce wrote:
>>
>>> Pff, VCOs.  DCOs are much better.  I bet you can't even do arbitrary 
>>> waveforms, never mind exhibit repeatable tuning characteristics to 
>>>  >10ppm ;-)
>>
>> The Double Deka has a user drawn waveform, and is stable to better than 
>> 50 ppm/K.
>
> I remember feeling great joy in the electronic music class I took at Wash 
> U, oh, 20 years ago or whenever it was, when I figured out the ARP 2500 
> sequencer could be clocked at audio rates.
>
> Of course, I highly doubt it was stable to 50 ppm/K though. ;)
>
I remember doing the same with Tim Orr's 'Wireless World' design, (which I 
think had 6 steps, max). Again I think the stability was in the 'Parts per 
10,000' region.
I do like 'draw your won waveform idea. I used a multiplexed version in a 
sort of Organ I made whilst a student, now long lost, though due to costs I 
had 12 steps, one of which was fixed at zero, (for some reason, at the time, 
I thought it was good idea to start from zero).
Would Bucla's 'MARF' do the same thing,.
Sorry, now way off topic.....

Mike