BOSS DR-55 Dr. Rhythm

BOSS DR-55 Image

The DR-55 Dr. Rhythm was released in 1980 and was one of the first step-write-style drum machines, and it was the first rhythm machine in BOSS' successful Dr. Rhythm Series. It was small, inexpensive and easy to use - perfect for musicians at any level. Incredibly basic controls and sounds made this drum machine an instant hit among guitarists and other musicians looking for drum accompaniment to practice along with and even record into their home recordings.

The DR-55 could store up to six 16-step drum patterns plus an additional two 12-step patterns. The 12-step patterns allowed for 3/4 and 6/8 rhythms. A variation switch allowed you to, on-the-fly, alter the pattern playing. There were only four sounds in the DR-55 which included Snare Drum, Kick Drum, Rim Shot and Hi-Hat. The sounds are comparable to Roland's CR-series of rhythm machines as well as some of Roland's cheaper TR-machines (like the TR-505, TR-606). You can globally adjust the Volume, Tempo, Tone and Accent for the drum sounds.

Step-Mode programming was accomplished in a fairly basic manner: Switch the DR-55 into Write Mode and select a sound from the Sound switch, and use the Start button to place the sound and the Stop button to step through the 16 (or 12) beat pattern. Only Kick, Snare, Rim Shot and Accent could be placed in a pattern in step mode--the Hi-Hats could only be programmed as either Off, 8ths, 12ths or 16ths via the Hi-Hat switch. Primitive programming for sure, but very simple and effective.

Today, where its sounds can easily be sampled, the DR-55 may seem pretty useless. However it does have an authentic sense of nostalgia being BOSS' first DR-machine and also quite a successful early programmable drum machine. You may not find a need for such an instrument today although it does make a great conversation piece! It has been used by New Order, The Cure, Chris Carter, Sisters of Mercy, Chris & Cosey, Xeno & Oaklander, Soft Cell and Thomas Dolby.

Lookup BOSS DR-55 Dr. Rhythm Prices

The link above will take you to an eBay search for this synth to see active listings with more images, specs and information. If you don't find it there, try looking in our forum marketplace. Our marketplace gets thousands of visits every week so make sure to check back often if you want to buy or sell a synth.

Related forum topics


Are you looking to buy or sell a BOSS DR-55 Dr. Rhythm? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.

41 Visitor comments
Big Chris
November 4, 2013 @ 7:55 am
I converted my DR-55 to run from a power supply unit. I converted it by drilling a hole into the battery compartment and mounting a 2.1mm socket. The downside to this approach is no room for the batteries, which means the memory is erased when the machine's switched off. Not an issue for me, but there may be enough room to mount a socket elsewhere and have the batteries installed as well. Just make sure you use a 6V PSU (regulated preferably), not a more common 9V one.
October 30, 2013 @ 1:39 pm
Here is an example of what you can do with this wonderful drum machine:
May 25, 2013 @ 9:27 pm
Just wanna inform you all DR55's owners, never ever think about using the 9V battery with your DR55. Its likely to fxx up the CPU. It already happened to me but fortunately i could manage myself to get a spare part..
Paul FitzZaland
May 14, 2013 @ 8:53 pm
@sean Yes, please send me the contact info for the Australian guy.

May 12, 2013 @ 6:04 pm
could you forward me the details for this Australian chap?

MIDI with the DR-55 would open up some nice doors. Such a beautiful and simplistic drum machine.
VSE Rating


User Rating

Rated 3.4 (268 Votes)

  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - 4 voices
  • Oscillators - 4 sounds (Kick, Snare, Rim, Hat)
  • Sampler - None
  • Sequencer - 16 step sequencer
  • Effects - None
  • Memory - 8 patterns (six 16-step; two 12-step). No Song mode.
  • Keyboard - None
  • Control - CSQ sync
  • Date Produced - 1980
  • Resources & Credits
  • Images from

    Reviewed August 2008.

Errors or Corrections? Send them here.