Musical Scales is the best method for learning scales. It also helps you learn to improvise in specific keys while you train your ear to recognize those keys. It doesn't play chords but it does allow you to transpose the notes for any instrument. For Saxophone, Flute, Oboe, Bassoon, Trumpet, Trombone, French Horn, Clarinet, Piano, Keyboard, Violin, Viola, Cello, Chello, Bass, Tuba, Harp, Xylophone, Harpsichord, Banjo, and any other Instrument.