Hi el-folie.
I'm not a guru or anything about the CS80V; I just love the CS80 and have nothing against Arturia, they did a remarkable work when it comes to modeling the oscillators or filters' curves.
I cannot decide where the project should go, I think that the guys at the moment are trying to get a 2.0 with just some new features, don't really know.
Coming to your questions:
1: wheter it is a bug or not, the overall volume shouldn't be affected when you move the M lever down, on the contrary, the original gets a slight increase .
2. You can use whatever ribbon but:
- the CS80V wasn't successful in modeling the "on/off" effect that you hear when you try to do a trill, this was a basic because of the nature of the circuit (if you put your finger on the ribbon you close a circuit so you turn it on, as opposite to when you put your finger off the ribbon)
- -the other problem is in the Kurzweil ribbon itself: it has a memory function IIRC, which prevents a little to do a correct job. Meanwhile there is an italian small company called SKNote which produces a ribbon that is able to do the CS80 job; or otherwise the Eowave company which produces ribbons too
3. Velocity: I talked about that with one of the old developers and he agreed with me: of course if you want to do it you would need a lot of calibration; I made atry with a modular environment and it tells me that the velocity env+ master envelope should drive the filter in an exponential fashion.
4. Special feature: nothing special my friend, of course you can do it with the matrix but how can you figure it out to program the matrix for a factory preset sound, given that you can't save them or save just a single synth channel? I can't tell it to you here, the devs seem quite lazy, but it is there, it's hardwired and it's fairly visible, nothing buried in the diagrams at all.
But I can give you a hint: listen to any record that uses the CS80; do you hear the filters open
completely ?
Salutes