[sdiy] Module inferfacing

[Jay Schwichtenberg]

Tim,

No, I think that in most cases you are ok. You will need attenuators along
the way, but you may have those built into your modules already.

Think of it this way bipolar signals will modulate a above and below a
certain point. Let's look at vibrato as an example. You will tune your VCOs
to some point with their freq controls. The VCO will be internally biased
above 0 volts. Now add your vibrato (attenuated +/-10v LFO) of about +/-
1/120v (roughly +/- 10 cents, note 1/12v, divide that by 10). As long as you
have the VCO internal biased above -1/120v you will be fine. This applies to
most control voltages for typical VCO and VCFs. Only thing that might be an
issue is with VCAs. If you have a 'volume' pot on your VCAs then you are
fine, if not you will have to bias those.

So set your controls to your where you want to modulate around then add the
modulation to whatever works for you.

Happy modulating.
Jay



> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Tim Ressel
> Sent: Thursday, December 19, 2002 1:37 AM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] Module inferfacing
>
>
> Yo,
>
> Did I most carefully paint myself into a corner?? My
> modular uses +/- 10V signals and 0-10V controls. But
> then I realize the nessessity of plugging a signal
> output into a cv input. Few if any of my modules will
> respond well to negative CVs.
>
> What do I do?? Do I make precision scale-offset
> thingies to bump up signals to cv range??
>
> --tr
>
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