Well done Max, nice to see something constructive come out of that thread! I'm also a MMv and CS80v owner..perhaps you might like to post this also in the CS80v forum too?
all the best, Mark
Max Fazio <faxiomas@...> wrote:
hi GuysI recently posted some words to arturia about cs-80 emulation with statements on oscillators: Xavier Oudin, one of the head developer there replied me ; I addressed him to the useful studies Crow made on the IG series chips ...here's the mail :>begin quoteHello 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
>
> 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
>
> http://launch.groups.yahoo.com/group/yamahacs80/
>
> to share opinions with many CS80 owners and restorators
>
> friendly yours
>
> Max from Italy
>
>
>>end quoteGreetz!
max