The Sound Library Series is designed for musicians interested in composing & recording their own music. Each package is made up of the following 3 components: The CD-rom is completely filled with professional-quality audio files that have been specia lly prepared to help you create amazing original music. The Audio CD contains 99 tracks and is included as bonus so that you can quickly hear a demonstration of each of the 101 basic drum beats. The accompanying book provides music notation .