(Brass). 12 intermediate to advanced classical solos for trombone and piano, with online recordings of performances by The Canadian Brass member Eugene Watts, and piano accompaniment tracks. The audio is accessed online using the unique code inside each book and can be streamed or downloaded. The audio files include PLAYBACK+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, and pan left or right.