I have a .m4a audio file I recorded off the web. I would like to split it into separate tracks. What is the best way/program to do this with? I had planned on using Spin Doctor which came with Toast do it, as it puts on everything in a visual graph so I could find the song breaks easy.....BUT Spin Doctor doesn't work on Mavericks...or Mountain Lion...or Lion...... Is there a good/decent replacement? There's no cue or anything track...XLD wouldn't load the file.