if you´re looking for a free, open source DAW software...

have a look @ this site...

www.ardour.org

Ardour is a digital audio workstation. You can use it to record, edit and mix multi-track audio.

Ardour capabilities include: multichannel recording, non-destructive editing with unlimited undo/redo, full automation support, a powerful mixer, unlimited tracks/busses/plugins, timecode synchronization, and hardware control from surfaces like the Mackie Control Universal. If you've been looking for a tool similar to ProTools, Nuendo, Pyramix, or Sequoia, you might have found it. (text take form site)

here some screenshots

Main Window

Midi Window

peaceout