> Well, a question becomes: why doesn't Paul use voltage regulators on his
> 5v modules...
>
Simple: that would suck all the current off the +15V side. And, having a 10V
differential (15-5) means lots of heat. We no wanna no heat in the synth!
For lowest noise, you want ∗balanced∗ current draw from the +15V and -15V. Also,
you don't want digital stuff with high clocks (say 12Mhz) and fast edges leaking
into the analog supplies.
Paul S.