Amazon.com description: Product Description: Tune 1000 features high-quality sound-alike arrangements complete with lyrics and MIDI back up. Lyrics can be displayed on keyboards and software sequencers with lyric read-out capabilities, and back-up vocal parts are included in each file for use with compatible harmonizer voice processors. Great for gigging musicians or amateur hobbyists! Each Tune 1000 pack comes with a GM-compatible disk with great songs. Also included are simple set-up intructions and a complete guide to channel settings for non-GM instruments.