[sdiy] +/- 9v synth circuits

[Ryan Guilfoyle]

 Wondering if anyone can give me some insight on a
project I'm working on. I'm trying to make a small 9v
battery powered synth, for open mic nights/use at
college. It does not need to be very complex or
expensive, only portable and stable tuning wise. I've
already got an LFO/AR and some cv processing circuits
working on +/-9v, the main problem I see is making a
making a multimode SVF, and a VCO. The synth does not
need to have more then a 3-4 octave range on the vco's
ect.. My planned config is 2 pulse/tri vco/2 lfo/ 2
env/ 3way mixer/MM vcf/lag and S&H/noise and 2 vca's.
I have a bunch of EFM boards I thought I lost in my
last move, and it would be very nice if i could get
them to run on +/-9v.I will be following the bat's
with voltage reg's. Any pointers tips ect.. would be
greatly appreciated.


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