I have the Model 15 and the Zeroscillator. Both are excellent at what they do. The ZO
produces everything you could want and more in the FM department and also works great
as an LFO with the quaderature outputs.
The M15 is my favourite oscillator. All the waveforms sound very rich and animated, the
stability is excellent. I love the sound of the sync and FM and the morph function is just
the icing on the cake. I just wish I had another three of them. I feel the M15 is better
value for money and certainly scores very highly in the fat department.
If FM is what you're after I'd certainly recommend the ZO.
Both oscillators do way more than the printed specs would suggest.

Thighp

--- In Doepfer_a100@yahoogroups.com , "untiedstates" <untiedstates@...> wrote:
>
> I have 2 M15s.. from the panel their range is 3.2Hz-20KHz, lower via CV.
>
> They sound great to me..
>
> I use the morph more for manually crossfading oscillators - very
> convenient because it puts 3 out of the 4 available waveforms useable
> from one output, aside from the individual outs for each.
>
> The sync was described as somewhere between soft and hard sync, and I
> really like the way it sounds... a rough beating sound when the VCOs
> are tuned in between harmonics and the sync is grabbing for a stable
> spot - nice.
>
> From what I understand, the M15 has exponential FM input.. vs. the
> linear FM of the Zeroscillator. But then, I haven't heard the ZO to
> compare how the different FMs behave (someone care to explain )
>
> -Bryan
>
> --- In Doepfer_a100@yahoogroups.com , "thomasborax" <thomasborax@>
> wrote:
> >
> > --- In Doepfer_a100@yahoogroups.com , "selfoscillate"
> > <synaptic_music@> wrote:
> >
> > >
> > > i didn't have the time for real in-depth comparison yet,
> > > but to my ears the model15 and zeroscillator sound
> > > quite different. the possible amount of linear fm
> > > seems to be greater on the zeroscillator, so it can
> > > produce a wider range of sounds. the fm performance
> > > is really outstanding on the zeroscillator, i have
> > > never heard anything like it before.
> > >
> >
> >
> >
> > hi. pardon me for resuscitating an older topic. lately i've been
> > pondering incorporating more "fm" type possibilities into my doepfer
> > suitcase synth.
> >
> > would anyone on the list mind detailing the high/low points of the
> > doepfer high end vco, the plan b model 15 and the zeroscillator
> >
> > it is easy to see how the ZO is very crazy and flexible, but it is not
> > immediately obvious to me what features the plan b m15 offers over the
> > a111, other than the morph, and since the morph is vactrol controlled,
> > i conclude that it is therefore not possible use audio signals to
> > morph wave forms. i don't doubt the many fans of this oscillator, but
> > what is the big deal
> >
> > what is the lowest frequency available on the m15 and the a111
> >
> > it is saddening somewhat that the ZO just went up again in cost. it
> > would most likely take up too much room in my small synth too.
> >
> > thx in advance for anyone who contributes info ----- - - - -
> >
> > tom
> >
>