[sdiy] Output Voltages

[David G Dixon]

> I've settled on +/-10V signal voltage for my semi-modular 
> design (semi because it will be starting life as a bunch of 
> loose, multi-sized PCBs) but what I can't figure from what I 
> have read to date is what I should actually be presenting at 
> the OUTPUT jack, when the signal passes (via a suitable 
> buffer) from the synth to the Big Bad World.
> 
> Need to figure this out to get the design of the little LM386 
> based powered speaker I'll be using for listening to what's happening.

I think you might be making a big mistake!  If you're power supply is
+/-15V, then your opamps will be clipping at +/-13.5V (roughly).  That means
that any significant resonance on filtered waveforms will most likely suffer
clipping distortion.  My system is +/-5V signals with a +/-15V PSU, and I
still get clipping distortion occasionally in certain circumstances.