Brian Blume’s Friction is a tour de force for marimba duo with audio accompaniment. Masterfully composed, the work consists of two movements—I. Internal and II. External—that each explore the concept of friction in different ways that have the potential to raise the hairs on the back of your neck. The audio accompaniment tracks create a tense, electric sound bed on which the two marimbists spin a complicated web of rhythmic and harmonic dissonance that delivers a powerful musical (even cinematic) experience to the listener. This piece comes as a professionally printed and bound score and includes individual parts in PDF format for printing or for tablet viewing. It also includes stereo accompaniment tracks in WAV format.