A distinctive musical sound found originally in hip-hop, "scratching" is now found in music as diverse as jazz and classical. To create it a DJ manipulates a vinyl LP playing on a turntable by placing the needle down in various grooves and rotating the record back and forth rapidly. The DJammer is a musical instrument that allows a similar manipulation of digital music files through hand movements. Previously stuck behind a console, the DJammer's wireless technology allows DJs to perform without being tied to a set of turntables. Thus the DJ scratches and mixes MP3 files while in the audience or onstage. The HP DJammer concept demonstrations have resulted in broad positive press and increased customer interest in HP digital music.