Hello,

Le vendredi 08 juin 2007 à 16:15 -0400, David F. Place a écrit :

Has anyone any experience using
a simple device like a trigger pad for a midi drum kit? Maybe
something like the Roland PD-8?

Cheers, David

With a tiny pc shuttle, the internal soundcard (a via as far as I remember), fedora core 3, pd, the Gunter Geiger low latency patch taken from CCRMA repository, and some batch magiks, I've built a drum expander where the Roland MIDI trigger converter Tmc6 is connected by a m-audio USB midisport.

The choosen audio driver is OSS, because it was the fastest one with pd-0.37 and the low latency patch.

The pd application I've made for playing drum samples uses xgroove , coll, vasp, tot, widget, zexy,... too many externals.

That was my experience.

Actually, I wouldn't like to dig anyone into the forest of undocumented patches I've made and rewrite occasionaly, but will try to make available as soon as possible a vanilla set of abstractions that could make all the work.

Anyway the percusionist I've made this installation for is very happy about this; I've even found it has a lower latency than some expanders we find in commerce.

Also, I couldn't help about drum modeling, the math are very complicated, at least too much for me, and I'm not sure if the processing of a drum noise will be fast enough with an usual computer, I'm more into interfacing the stuff, and with samples it works great! :)

Handling all the MIDI messages that come from the trigger converter is not really a complicated task, a full search on pd-list archive might give all the answers. Though using those MIDI messages for reproducing the same behavior than the drum expander with using samples might be very tricky for some reasons, but not impossible, it's certainly a subject for a good discussion...

Patko.