[sdiy] Question about LFOs

[David G. Dixon]

Here's a noob-ish question about LFOs.  First, some background:

I'm developing a module with four non-voltage-controlled LFOs with variable
pulse-width saw-triangle-ramp and pulse outputs.  I've simulated both the
Korg MS-20 modulation generator (with its two JFETs driving the integrator)
and Ray Wilson's Multi-waveform LFO, sans sine-shaper (with its two diodes
driving the integrator), each with a few minor modifications.  The Korg
circuit generates (roughly) a 0 to 5V pulse and a -2.5 to +2.5 V triangle.
The MFOS circuit generates (roughly) -5 to +5 V pulse and triangle.

My question is this:  Is there some "standard" for LFO voltage output, and
if so, what is it?  Also, would it be desirable to be able to switch between
-5 to +5 V and 0 to +/-5 V outputs?

David G. Dixon
Professor
Department of Materials Engineering
University of British Columbia
309-6350 Stores Road
Vancouver, B.C. V6T 1Z4
Canada
 
Tel 1-604-822-3679
Fax 1-604-822-3619
 
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