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RE: Waveform mixing

RE: Waveform mixing

1999-11-29 by Dave Bradley

> From: JWBarlow@...
>
> I thought this may in fact be useful (with one big caveat) for
> subtracting
> out harmonics in complex waves (like subtracting out a triangle from a
> sawtooth wave), BUT (the caveat) one would have to add the
> fundamental since
> that would be subtracted out entirely. I'm wondering if anyone has tried
> this, or sees it as being useful? I have tried some initial
> experiments with
> this, and have found that using (from one VCO) a SINE and
> inverted TRI (or
> SQUARE) and an in phase SQUARE (or SAW), sounds better to me than
> using the
> in phase TRI (or SQUARE). I really like the sound and wonder what others
> think.
>
> JB

I like to do this also. You can cancel part or all of certain harmonics by
varing the amount of the out-of-phase signal that you mix in. You can always
mix the sine back in (non-inverted) to restore some fundamental.

Dave

Re: RE: Waveform mixing

1999-11-30 by JWBarlow@xxx.xxx

In a message dated 11/29/99 10:37:18 AM, daveb@... writes:

>I like to do this also. You can cancel part or all of certain harmonics
>by
>varing the amount of the out-of-phase signal that you mix in. You can always
>mix the sine back in (non-inverted) to restore some fundamental.

As always, Bradley is right! 

I've been playing with this technique a bit more since yesterday and looking 
at it on the scope (if only to convince myself that I did have the waves in 
phase as described -- very interesting to look at!). I still really like it 
and think others should look into it. Unfortunately, the VCOs for which I 
want to use this technique with don't have a SINE wave.

And do stick it in the Korg since 13V is way more than needed for any (?) 
gate signal for any synths -- typically 5V or 10V.
JB

Re: RE: Waveform mixing

1999-12-01 by Hugo Haesaert

Hi All !

Regarding high gate voltages, i've found my Roland System 100 (not 
100M ) needing something like 12.5 to 13 volts as well .  Lower gates 
produce incomplete envelopes .

Bye for now .


Keep 'em oscillating :)


Hugo
=