drum sequencer for a sound card or MIDI device

 This program emulates the operation of Roland's TR-707 Rhythm
 Composer.
 .
 The output is to a MIDI device, sound card or file. A
 Latin-percussion instrument map emulates the Roland TR-727 and
 the instrument map can be customized by the user. If you do not
 have a MIDI sound card, you should install the timidity package
 to emulate one..