Jazz Practice: How To Create 12-Key Workouts To Practice In Mapping Tonal Harmony Pro 9 iOS. Music App Tutorial.If you want to practice playing lines over different progressions using a backing track, then look no further than Mapping Tonal Harmony Pro.

Let me show you how to create a backing track with consecutive 2-5’s in all keys in less than a minute.

I hope that was helpful. Remember, Mapping Tonal Harmony Pro is available on mDecks.com and the AppStore.