Rosegarden - Music software for Linux

Rosegarden is a well-rounded audio and MIDI sequencer, score editor, and general-purpose music composition and editing environment. Rosegarden is an easy-to-learn, attractive application that runs on Linux, ideal for composers, musicians, music students, and small studio or home recording environments.

It supports MIDI and audio sequencer with unlimited tracks, Intuitive ways to record and edit notes, Recording, mixing, and using samples and effects, Play your MIDI tracks through hosted synths, for more accurate control, Edit and print score and lot more.