Audiotran allows you to increase or decrease the speed of any audio file without changing the pitch, or change the pitch without changing the speed.
You can create quick load play lists and record your settings for each song. You can create start and end points to play only a selected portion of the file in a continuous loop. This is especially useful for musicians who want to learn part of a song, and perhaps an instrumental solo.
With the Audiotran player you can change the speed of a song without effecting the pitch - musicians - slow the audio down and learn those solos, guitar riffs etc.