The Ultimate Play-Along series gives you everything you need to jam with your favorite songs. The books contain note-for-note tab transcriptions and the CDs feature amazing sound-alike recordings. There are two versions of every song on the CDs: an instrumental sound-alike recording and an instrumental accompaniment track without guitar so you can play along. When you use the CDs in your Mac or Windows-based computer, the TNT (Tone 'n' Tempo) Changer lets you easily loop sections for practice, slow tracks down or speed them up without changing the pitch, change the key, and switch back and forth between the full instrumental and play-along tracks.