In addition to accompaniments playable on both your CD player and computer, these enhanced CDs include tempo adjustment software for CD-ROM computer use. Contents: First Sonata, Op. 120, No. 1 (Brahms) · Second Sonata, Op. 120, No. 2 (Brahms) · Sonata (Mendelssohn) · Fantasy-Pieces, Op. 73 (Schumann) · Grand Duo Concertant, Op. 48 (Weber) · Variations, Op. 33 (Weber)