Dr. Rhythm

DR-770: Dr. Rhythm


The DR-770 Dr. Rhythm is BOSS’ most advanced compact rhythm machine ever, offering a powerful sound engine and hundreds of patterns. This translates into the highest quality drum and percussion sounds and patterns of any compact rhythm machine on the market.

  • Top-of-the-line BOSS compact rhythm machine
  • 400 Preset patterns: Rock, Pop, Jazz, Latin, World, Standard and more
  • 400 User program memories
  • 255 high-quality drum and percussion sounds
  • 64 Preset drum kits and 64 User-programmable kits
  • Reverb, Flange and EQ control
  • Assignable Pedal switch allows Start/Stop, Forward, Rewind, etc.
  • Direct Pattern Play for instant pattern playback by pressing a single pad
  • 10,000-pattern memory onboard
  • New Ambience control permits 16 settings for overall drum sound (Stadium, Live House, Lo-Fi, etc.)
  • Quick Search for quick pattern location by musical genre


Maximum Polyphony
14 voices
Rhythm Patterns
User Patterns: 400
Preset Patterns: 400
Songs: 100
Song Length: Maximum 250 parts for a song
Total Parts for songs: 10,000
Per quater note: 96
Quater note: 20 to 260
Data Input Method
Realtime / Step
Maximum Note Storage
approx. 11,200 notes
Output Jacks (L, R(Mono))
Individual Output Jack
Headphone Jack (stereo miniature phone type)
Pedal Switch Jack
MIDI Connectors (IN, OUT)
AC Adaptor Jack (AC 14 V)
Power Supply
AC Adaptor (BOSS BRC series)
Current Draw
700 mA
AC Adaptor (BOSS BRC series)
Foot Switch: FS-5U
Pedal Switch: DP-2
Foot Switch Cable: PCS-31
Size and Weight
215 mm
8-1/2 inches
165 mm
6-1/2 inches
59 mm
2-3/8 inches
0.7 kg
1 lbs. 10 oz.
*The specifications are subject to change without notice.



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