NYSTRÖM – Crum Drum – Full DIY Kit

£165.83 (Excl. VAT)

Crum Drum is a 4-voice drum machine.  Get creative with fresh & unique beats using elements of randomisation & probability.

Note: this is not a Eurorack module

SKU: Bundle_Crum_Drum Categories: , , , , Brand:


Crum Drum is a 4-voice drum machine with built in randomisation and probability based sequencing designed by NYSTRÖM

Rhythms can be created and manipulated using the internal random sequencer or externally via MIDI USB. Press the beat button to generate new rhythms, adjust the probability to create continuous variations, and increase the randomness to modulate the sound of your beats! Generated sequences can also be sent out via MIDI USB and Crum Drum can also sync via analog clock in and out.

The four voices of Crum Drum are Kick, Snare, HiHat and Bass (FM). There are 8 parameters knobs to sculpt the character of each voice allowing for wide variety of tones. It’s easy to create  varied and organic sequences by adding modulation via the Probability and Randomness controls. Probability sets the chance that the selected voice will play per step of the sequence, while randomness increases the parameter modulation for each voice. The higher the randomness, the more each instrument parameter is modulated per step. Some of the instrument parameter controls have different behaviours depending on which voice is selected, so make sure to check the user manual for full details.

The INST knob is used to select which voice is active for editing as indicated by the four LEDs. All instrument parameters can be edited independently per voice, and when the INST knob is turned all the way to the left, all LEDs will light up and it’s possible to control all four voices simultaneously. This is great technique for slowly morphing the character of a sequence, or for quickly dialling in interesting fills and variations!

The BPM knob sets the tempo of the internal sequencer, and becomes a clock divider if an external clock is being used (MIDI USB or analog). The Step switch sets the length of the internal sequence between 16, 32 or 28 steps.

Press the beat button to generate new rhythms – when the Beat button is pressed it will generate a new sequence for the current step of the  currently selected voice. To generate an entirely new sequence, select all voices & press down the button for the duration of the entire sequence length.

Crum Drum features four global effects which are: Overdrive, Reverb, Delay and Swing. The delay-time is tempo synced and the subdivided differently dependent on the BPM.

Power is provided via micro usb cable (not included)

Crum Drum – Build Guide | User Manual | NYSTRÖM on Youtube


  • 4 instruments: Kick, Snare, HiHat, Bass
  • 8 sound parameters per instrument
  • Overdrive, Reverb, Delay & Swing
  • Send & Recieve Analog & Midi USB clock
  • Send & Receive Midi USB sequencing
  • Randomised and probability based sequencing

Dimensions: Width: 14.5cm, Length: 12.5cm, Height 4.2cm (including knobs)

You may also like…

  • MattBradshawDesign ‘DRUMKID’ – Full DIY Kit

    £50.00 (Excl. VAT)
  • Wirehead Instruments – Freaq FM – Full DIY Kit

    From: £112.16 (Excl. VAT)
  • Bastl – Kastle Drum – Full DIY Kit

    £82.00 (Excl. VAT)