[sdiy] harmonic generator

[Grant Richter]

Hi Mark,

The Electronotes design is slightly different (EN#84 pg.9). The manual
control pans between a sine and FWR sine, while the VC crossfader goes
between that and square.

That did not turn out to be as musical as VC crossfade between sine and a
manual mix of FWR sine and square.

Also both CA3080s in the design should have zero trimmers added. The DC
shift is up to 500mv without zero trims.

> From: mark verbos <a0284520 at addcom.de>
> Date: Mon, 25 Feb 2002 18:32:04 +0100
> To: synth DIY <synth-diy at dropmix.xs4all.nl>
> Subject: Re: [sdiy] harmonic generator
> 
> That is exactly what the electronotes timbre modulator does. Takes a
> sine input and full wave rectifies it. Squares it and then rossfades
> from the sine to a manual mix of these two. I have a board built of it,
> but never tested. I imagine it is a lot like a Buchla oscillator.
> Exactly like the extinct Wiard tone source.
> 
> mark
> 
> John L Marshall wrote:
> 
>> ----- Original Message -----
>> From: <media.nai at rcn.com>
>> To: <synth-diy at dropmix.xs4all.nl>
>> Sent: Sunday, February 24, 2002 3:17 PM
>> Subject: Re: [sdiy] harmonic generator
>> <snip>
>> 
>>>>> Wouldn't full wave rectification simply result in octaves??
>>>>> 
>>>> Yes, but you fail to get other overtones than 2, 4, 8 and 16
>>>> 
>> 
>> </snip>
>> 
>> My understanding is that a full-wave rectified (absolute value) sine wave
>> contains an infinite even harmonic series. A square wave contains an
>> infinite odd harmonic series.
>> 
>> I think that it would be interesting to modulate between full-wave rectified
>> sine and a square wave.
>> 
>> Take care,
>> John
>> 
>> 
> 
> 
>