Do you mean DJ mixing of 2 or 3 simultaneous sources' date=' or mixing different components of a track into a final stereo file ? If its DJ mixing there is Dekstacy [url']http://www.sonophile.com./ which is free (OSX only) Most folks are using NI Traktor, or Stanton Final Scratch, but these aren't free.. Steinberg Nuendo 2 is probably the best for multitrack mixing, although its not free either.. You can do a reasonable job in Cubase.. and I guess since you've already got it, it will be a good bit better than any shareware/freeware app and not cost any more dosh..