This perennial favorite among drummers helps players develop their bass drum technique and increase their flexibility through the mastery of exercises. I used Colin Bailey's Bass Drum Control book to develop my SINGLE bass drum playing and DOUBLE bass drum playing. I had the good fortune to get together with Colin and have him show me some of his insights into the bass drum pedal technique and found it to be very useful. -Steve Smith Audio is accessed online using the unique code inside the 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, changekeys, and pan left or right.