Hello Max,
Thank you for this interesting link.
I think I will update my oscillator algorithm to achieve this feature.
Best regards
Xavier
> Hallo
>
> Some days ago I was
in the kvraudio.com forum and I was reading
> something about the new
comer Arp2600V ; a guy wrote about the fact
> that each model shares the
same vco model : in fact he received a mail
> from you
>
> ∗Quote:∗
> _The oscillator algorithm is the same in all our
synthesizers. BUT the
> parameters of this algorithm are not ! rising
edge, the instability,
> the drift are completely different. MMV and ARP
are much closer than
> ARP and minimoog V, but there are
differences.
> >end quote<
>
> This is a good
thing but I think that the developement could now be
> more specifically
addressed to the waveforms themselves. I wish this
> could be made for
CS-80V ( I just bought a copy of it) : the hardware
> version has
some very particular waveforms , I discovered it by
> looking at a CS-80
expert and restorator site of Chris Rider aka "Old
> Crow" : he
reverse-enginereed the synth's circuitry and built some
> analog
reproduction of the original IG chips made for VCO and filters
> and
built some discrete versions of this model. The saw waveform
> results
has a little pulse on its edge and the square waveform has a
>
curvilinear edge : this waveshapes result also from the service manual
>
of the original so they made ∗intentionally∗ these waveform to achieve
>
a more rich in harmonics sound
>
> check out
>
>
href="http://www.cs80.com/vco.html">http://www.cs80.com/vco.html
>
> (old crow's page about the custom built cs vco)
>
>
You can contact him and see if he could make up another VCO model for
>
you for study purposes
>
> If the oscillator design would be
exactly the same , the machine would
> be∗ MUCH MORE cpu efficient∗, seen
that only TWO oscillators and NOT
> FOUR will be running !!
>
> Also I would suggest
>
>
href="http://launch.groups.yahoo.com/group/yamahacs80/">http://launch.groups.yahoo.com/group/yamahacs80/
>
> to share opinions with many CS80 owners and restorators
>
> friendly yours
>
> Max from Italy
>
>
>