Trommler is a GTK+2 based drum machine with the following features:

  - Use of 16 bit 44100 kHz mono drum samples
  - Real-time (stereo) audio output using the OSS API
  - Alternatively, audio output to file
  - Complex rhythms (variable number of beats per pattern)
  - Volume adjustment of drum samples
  - Stereo panning of (mono) drum samples

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