[sdiy] saw/ramp from square?

[Andrew Simper]

My previous post never made it through it seems, but something else that 
they do on the omni is adjust the dc bias to the diodes that clip off 
the bottom of the square waveform and use this as the volume envelope 
for the release of the string paraphonic voices. It leads to not only a 
quieter sound but a thinner one since you are just left with the peak 
steepest decent portion of the "saw" wave.

Andy

harrybissell at wowway.com wrote:
> I only need 1.5 octaves... so I choose a pulse that decays fast enough
> for the highest note, and that gives a spaced pulse on the lowest note...
> this eliminates DC offset (ok makes it constant :^)
>
> H^) harry
>
>
>
>
>
> On Sat, 17 Jan 2009 17:34:54 +0100, Magnus Danielson wrote
>   
>> harrybissell at wowway.com skrev:
>>     
>>> I used the differentiated square / rectifier for the sawtooth wave on the
>>> "Muffy" guitar processor (see Larry Handry's site). It does work well over
>>> a limited frequency range... and within limits the amplitude does not vary
>>>       
>> You could either integrate or derivate, but you want to stick an OTA 
>> in there which gets a coarse CV which is (fairly) linear to the 
>> frequency in order to keep a (fairly) stable amplitude as the 
>> frequency changes.
>>
>> Cheers,
>> Magnus
>>     
>
>
> Harry Bissell & Nora Abdullah 4eva
>
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