After almost 2 years of work, I've finished my DIY polysynth
It is based on various module designs available on the net.
I consider it to be a "Poor mans Memorymoog" with a little bit of Prophet 5 thrown in
. It features:
- 5 voices
- 2xVCO per voice
- 3xEG per voice (hardwired to pitch, cutoff and volume)
- 3xLFO (pitch, cutoff and PWM)
- Moog ladder VCF
- Noise source
- Ring Modulator
- Patch memory (128 user patches)
- Mono mode with selectable note priority (High/Low) and triggering (single/multi) and with portamento
- unison with adjustable detuning
VCO A offers sawtooth, square and triangle. VCO B offers sawtooth and square waves. Having triangle wave available is essential if you want to obtain some nice fm-like sounds from RingMod.
It's built using only standard off-the-shelf components - no CEM or SSM or similar chips inside - only typical opamps, switches, transistors etc.
Case (together with keyboard) was salvaged from some crappy 70's combo organ.
Here it is sitting on a stand (photo made with phone - sorry ):
With front panel lifted up:
With keyboard lifted up (showing voicecards):
Main digital board (keyboard scan, voice assignement and patch memory):
Front panel close-up:
MP3 demos: http://ensoniqsq2.republika.pl/b5demo.html
alternative link: http://share.ovi.com/channel/adamstan.synthdemos
It is noisy and tuning drifts a little bit, but hey, isn't that what we love vintage synths for?