What is a good free software to make / play music on your computer?

Something like this, but free: http://www.qweas.com/download/audio_mp3/midi_tools/itype_music.htm I just want to be able to compose songs with several different instruments, and save to a file … I'm sure there are some software out there, but where? In fact, the link he gave was a bad example, now that I look at it: P I want something to CREATE music.

http://www.mymusictools.com/download/music-creator/ One perhaps?

Nawal Al Zoghbi “Tool Omri” Music Video