[sdiy] Analog synths with 2 pole filters

[Andrew Simper]

Hi Guys,

I'm having a discussion with a friend who said that "most analog
synths with 2-pole filters won't self-oscillate". I know quite a few
analog synths with 2-pole filters that do self osc, so I thought I'd
write up a list to shed more light on the situation.

Can you guys please help me fill in the considerable missing gaps by
naming some more and/or correcting what I already have? I know that
you can make ladder / cascade / svf / sallen key 2-pole analog filters
that self oscillate, this is really just seeing how most production
synths have been designed.

Analog synths with 2 pole filters that self oscillate
--
Korg MS-10 / MS-20 / Monotron / Monotribe (sallen key)
Steiner Parker Synthacon (sallen key)
Oxford Synth Company OSCar (svf)
Electronic Dream Plant Wasp (svf)
Oberheim Xpander (cascade)
Formanta Polyvoks (svf)
Arturia Minibrute (sallen key)
Elektron Analog 4 (svf)
Dark Energy v2 (svf)
Future Retro XS (svf)

Analog synths with 2 pole filters that don't self oscillate
--
Oberheim SEM (svf)
Roland JP6 (svf)
Alesis A6 (svf)
Prophet 8 / Prophet 08 (cascade)
Yamaha CS 80 / CS 40 (svf)

Thanks!

Andy
--
cytomic - sound music software