Roland Boss DR-670 Dr. Rhythm Get some great beats right away with the Boss DR-670 Dr. Rhythm Drum Machine. This compact rhythm-creation tool offers all the acclaimed sound from Boss' flagship DR-770 while adding enhancements like velocity-sensitive pads and footswitch control. 255 no-compromise drum and percussion waveforms grouped into 64 preset and 64 user kits. Program bass lines using 16 distinct sounds including Finger Bass, Slap Bass, Acoustic Bass, and Pick Bass. Buttons are physically set up like the notes on a bass. Up to 100 songs. 200 preset rhythm patterns, 200 user patterns. Large LCD. Foot control jack for handsfree start/stop and fills with optional footswitch. Assign patterns to pads for triggering on the fly with Direct Pattern Play.