Polarity's Riffster (Mac/Win) is designed to assist musicians in learning riffs or entire songs, by capturing short loops or entire songs. The program lets you change pitch and speed independently, and it can play CD audio, WMA, and MP3 files. The program allows you to save your session settings, and it can be used with a MIDI controller. Upcoming enhancements include VST plug-in compatibility.
A free demo is available online. For more information visit www.polarity.com.