Got it in a newsletter for a video program but http://www.fastcompany.com/3041373/...-a-free-version-of-the-audio-editing-software has a good writeup in the meantime. http://apps.avid.com/ProToolsFirst/ is the site for it all. Pro Tools is one of the bigger reasonably high end audio tools that mere mortals can get to play with. Quite what triggered the move nobody is quite sure of; they already have a subscription service option to compete with Adobe (who do the Audition program, which was in turn once known as Cool Edit Pro, and would be one of the bigger offerings in this world), FL Studio is hardly eating their lunch and GarageBand (Apple's offering) is not winning itself many fans these days. As with most efforts like this it is restricted compared to the paid offerings but free still gets you 16 tracks at all the usual sample rates, 4 inputs if you have the hardware for it, 16 midi, 16 instruments and respectable offerings for the other various metrics you might measure such a program by. You will also be lacking some of the fancier filters. Myself I have most of what I need from Audacity and Openmpt, or what comes with my video editors, but some around here would probably be interested to see it.