Na Linux je asi najlepsi Renoise tracker:
http://www.renoise.com/

With Renoise you create loops, beats and melodies efficiently step-by-step.

It's a complete, expandable Digital Audio Workstation (DAW) with a refreshing twist.

Renoise is affordable, yet no corners have been cut in regard to features.
Renoise is based on mod trackers. Mod trackers are characterized by displaying and editing music in an easily understood grid known as a pattern. These patterns are akin to sheet music, but are displayed alphanumerically instead of with musical notation.
Whether you're an audio veteran or just starting out, Renoise is a fantastic addition to any bedroom or professional studio.