[sdiy] Analog synths with 2 pole filters

[Doug Terrebonne]

Actually most 2-poles DO oscillate, your friend has it backwards... You can add 
ARP Odyssey whiteface mkI, OB-Xa, and OB-8 (if you adjust the 2-pole res trimmer 
to osc)...

Doug 
synthparts.com



----- Original Message ----
> From: Andrew Simper <andy at cytomic.com>
> To: synthdiy diy <synth-diy at dropmix.xs4all.nl>
> Sent: Wed, February 20, 2013 6:41:24 PM
> Subject: Re: [sdiy] Analog synths with 2 pole filters
> 
> On 21 February 2013 10:34, Andrew Simper <andy at cytomic.com> wrote:
> > 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)
> 
> And another, no self osc in 2 pole:
> Oberheim  OB8
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