Complete Method for Alto Trombone Vol.1 (The Anderson Method is one of the better methods for alto on the market in that it actually gives written instruction and advice on how to approach the horn. Many other books merely present the player with a series of exercises and etudes in the alto clef. The Anderson helps the tenor player develop strategies and techniques for switching to alto so that they actually learn to play the horn rather than learn a few rote tunes)
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