Marketing this, you should include the potential use for musicians to slow the tempo down of music to learn the parts. Tried it on a few songs and it works like a champ.

Picking apart complex bass lines, lead guitar parts and lyrics from recordings at their normal speed is a painstaking task. This program makes it easy with it's simple interface. You're ignoring a whole market segment by not including this information in your program description. Thanks for making the program available for free.