Thank you for your question! 

For the MTI Performance Accompaniment Recording (which provides tracks for both rehearsals and performances through the MTI Player app), go here: https://www.mtishows.com/marketplace/resource/performance/performance-accompaniment-recording

For the RehearScore App (which provides rehearsal piano tracks), go here: https://www.mtishows.com/marketplace/resource/pre-performance/rehearscore

You can also look at RehearScore Plus here: https://www.mtishows.com/marketplace/resource/pre-performance/rehearscorerplus

If you have further questions, please call our main line at 212-541-4684 to speak to a licensing representative.