The Boss ‘Dr. Rhythm’ DR-55 was Boss’s first programmable drum machine, released around the same time as its bigger sibling, the Roland TR-808. It’s pretty basic, and sounds less like the 808 than its predecessor, the CR-78.
I’ve designed a few mods for the DR-55 which enhance its utility somewhat, and written a general overview of the machine:
- Boss DR-55 overview
- Getting inside
- DC input mod (eliminates battery, runs from external supply)
- External clocking (trigger the DR-55 from another source)
- Replacement start/stop legends