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Electro Harmonix DRM 15 Digital Rhythm Matrix

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Released in 1982 the Electro Harmonix DRM 15 Digital Rhythm Matrix is a versatile drum machine in a pedal format. The unit offers 4 style categories with 4 variations of each style. It also allows for some flexibility with how the user uses it or in simpler terms minimal editing by way of the delete button.

The unit also has the famous Space Drum sound found on other products from Electro Harmonix. the Space Drum sound has a dedicated on/off switch when it is not being used. The DRM-15 also offers lock IN and Clock Out for syncing with other rhythm machines and analog devices.


Type: Digital
Sound Engine: ROM
Pattern Engine
Programming: Presets
Pattern Notes:
+16 Patterns
+4 Patterns Of Styles
+4 Patterns Per Style
Sounds Per Pad
Sounds Per Pad: 1
Sources: ROM
Polyphony & Tuning
Polyphony: 8
Timbrality: 8
Tuning: Standard
Modes: Polyphonic
Patterns User: 1
Patterns Preset: 16
Case: Pedal
Controls: Knobs, Modulation 1/4" Jacks, Switches
Display Type: LED
MIDI / Sync / Trigger
Audio Outputs: 1/4" Phone Jack, Mono Out
Audio Output Count: 1
CV Ports: DIN
Retail: $189
Used: $$81-$800
Released: 1982
Design Notes:

There were two different versions of the DRM-15 that had a slight difference between them. The first edition featured an additional audio output for the bass drum sound. The latter versions did not and instead added the Clock Out output.
References & Sources

  Report Drum Machine

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