Trommler is a GTK based drum machine with the following
features:

- Use of 16 bit 44100kHz mono drum samples
- Realtime audio output using the /dev/dsp device
- Audio output to file
- Variable number of beats per patter 
- Volume adjustment of drum samples
- Stereo panning of (mono) drum samples

WWW: http://muth.org/Robert/Trommler/