Just bought for fun one of those drum kits in nearby thrift shop. Wrote
this program because all existing ones (drumroll and jackdrum) didn't
work with my drum kit, and were using libusb-0.1 which is deprecated, and
didn't have loop buffer which is cool, and one of them used math.h only to
do pow(x,2) but not simply x << 1.
All info necessary to determine endpoint got from lsusb. Some things may
differ between different drum kits.
To gracefully exit program send it either SIGINT, SIGHUP, SIGTERM or
SIGQUIT, eg. press Ctrl+C in your terminal.
Larger values of loop buffer will increase time spent at gathering data from drums, so it can minimize false release action. Big values will cause specific delay.
To check how note number and actual drum sound corresponds look at http://www.midi.org/techspecs/gm1sound.php
Pad numbers in my case were:
1 3 2
6 5 4