Hi,
where do I find more info about physical modelling opcodes?
Mostly things like parameters range and their useful values. Or what which parameter means (sometimes it’s a bit mysterious).
For example I noticed in Cabbage’s barmodel demo there is some mapping between barmodel stiffness and input MIDI notes but it’s not said where do these magic values came from?
Also when experimented with wgluck2 opcode I realized it sounds good but in lower registers it has actually bit too long decay time unlike for example real lowest guitar string. Is there any way to fix this or it’s just easier to slap some envelope on it?
Hi Mikoláš,
I think my answer will not be too joyful. Physical models can be temperamental. I mostly used trial and error. With the pluck models, experiment with the damping/LPF parameters. The barmodel took a while to get right. I tuned it by ear.
Raw physical models are very open. they can explode or not sound at all. The magic happens in the "musical tuning" of the parameters. At least, that's my opinion.
Also, be aware that the orchestra's samplerate may influence especially the higher registers of physical modelling opcodes strongly.
I wrote the Cabbage barmodel example; the mapping values were derived using a previous csd which iteratively searched for appropriate stiffness values using pitch tracking of the result. I’m sure there could be a more elegant way of going about this, but the results seemed acceptable and any remaining error added some colour I felt.
For string models, I would recommend building your own to facilitate more personalised exploration and improved tuning. The bass guitar Cabbage instrument is an example of this approach. Aaron Krister Johnson has done some great work in this area in designing PM harpsichords.
Iain
Csound mailing list Send bugs reports to Discussions of bugs and features can be posted here