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Quad chiptune audio generator

Mutable Instruments · 20 HP · 3U

Xmod 1 (hard sync 1 to 2): off Xmod 1 (hard sync 1 to 2): on
Xmod 2 (ring modulation 1 x 2): off Xmod 2 (ring modulation 1 x 2): on
Xmod 3 (ring modulation 1 x 3): off Xmod 3 (ring modulation 1 x 3): on
Waveform select 1
Waveform select 2
Waveform select 3
Waveform select 4

Panel · 101.6 × 128.5 mm

Description

Mutable Instruments' quad chiptune audio generator, in 20 HP: four digital oscillators in the manner of the sound chips of 8-bit consoles and home computers, three square waves and a fourth channel of triangle, sine or noise, with a mixer.

Key features

  • Channels 1 to 3: square waves with 50%, 66%, 75%, 87% or 95% pulse width, or a pulse width set by CV
  • Channel 4: sine, triangle, NES triangle (16 loudness levels), sample-and-hold noise, or the NES LFSR noise in its long and short cycles
  • Per channel: GATE, V/OCT and MOD inputs, a FREQ knob over 6 octaves, an output and a LEVEL knob for the mixer; GATE and V/OCT are normalled from one channel to the next
  • XMOD switches: hard sync from channel 1 to 2, ring modulation 1 x 2 and 1 x 3
  • WAVEFORM SELECT buttons with gate lamps; per-channel semitone quantizer, 8-step sequencer and calibration
  • MIX output; made from August 2013 to October 2016; the design is open source

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