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Expert Sleepers Disting mk4

  • $189.00


The disting is a many-in-1 multifunction module, offering a variety of CV and audio processes, including a selection of oscillators (LFOs/VCOs). All algorithms have two high-precision inputs and outputs, and a third control input, exposed on a front panel knob and a CV input.

The disting is also a sample (WAV) file and MIDI file player, with a variety of options for sample triggering, playback speed etc.



There are currently five 'banks' of algorithms. The first 16 ('classic disting') are:

Group 1 Group 2 Group 3 Group 4
Precision Adder
with integer voltage offsets
Linear/Exponential Converter Sample and Hold
with noise source and
adjustable slew rate
with through zero frequency control
and waveshaping
Four Quadrant Multiplier
with integer multiply/divide
with selectable scales
Slew Rate Limiter
with linear and
exponential slew
Clockable LFO
with multiply/divide
and waveshaping
Full-wave Rectifier Comparator
with adjustable hysteresis
Pitch and Envelope Tracker VCO with linear FM
sine and saw outputs
4 Minimum/maximum Dual Waveshaper
wavefolder and
triangle-to-sine shaper
Clockable Delay/Echo VCO with waveshaping
and pulse outputs

The second bank contains:

Group 1
Group 2
Group 3 Group 4
Precision Adder
with fractional voltage offsets
for drum synthesis
LP/HP Filter
Voltage Controlled
Delay Line
vibrato/chorus/flange effects
12 band
Tape Delay
with voltage controlled tape speed
LP/BP Filter
Clockable Ping Pong Delay Phaser
up to 10 stages
BP/HP Filter
4 Clockable Ping Pong Delay
with input pan control
State Variable Filter
smoothly variable filter type
BP/Notch Filter

The third bank contains:

Group 1
Group 2
Group 3 Group 4
AR Envelope Dual AR Envelope Clockable AD Envelope
(with mute)
Shift Register Random CVs
AR Envelope
(with push)
Dual AR Envelope
(with push)
Clockable AD Envelope
(with gate)
Shift Register Random Quantized CVs
AR Envelope & VCA Clockable AD Envelope
(with trigger)
Shift Register Random Triggers
4 AR Envelope & VCA
(with push)
Clockable AD Envelope & VCA
Shift Register Random Dual Triggers

The fourth bank contains:

Group 1
Group 2
Group 3 Group 4
ES-1 Emulation Tuner Crossfade/Pan
Pitch Reference
4 Frequency Reference

The fifth bank contains functions relating to playing back audio and MIDI files from the MicroSD card:

Group 1
Group 2
Group 3 Group 4
Audio Playback MIDI File Playback (Clocked)
Clocked Audio Playback
Audio Playback with V/Oct MIDI File Playback
(Free Running)
4 Audio Playback with Z Speed Audio Playback with End CV


mk4 version

The disting mk4 was introduced at the NAMM show in January 2017. The main differences compared to the disting mk3 are:

  • Dot matrix screen, capable of showing text and numeric values
  • Micro SD card slot accessible on the front panel
  • Compatibility with the Select Bus protocol
  • An internal precision clock allowing new algorithms such as a tuner, and pitch and frequency references


The disting mk4's specifications are as follows:

  • Panel width: 4HP
  • Module depth: 42mm
  • X & Y inputs, A & B outputs
    • Sample rate: 75kHz
    • ADC: 24 bit, THD+N -93dB, Dynamic range 99dB, SNR 99dB
    • DAC: 24 bit, THD+N -94dB, Dynamic range 105dB, SNR 104dB
  • Z input sample rate: 75kHz
  • CPU: Microchip PIC32MX at up to 50MHz
  • Current draw: 51mA on the +12V rail, 19mA on the -12V rail

The front panel is drilled for both Doepfer and Analogue Systems mounting holes (using a 'slot' rather than a single round hole). The power connector is a Doepfer standard 16 way IDC, with -12V furthest from the top of the board.

For more detail, please see the user manual.


The Disting is based around a PIC microcontroller, with a programming/debug header available on the board. Using Microchip's free development tools a user can easily hack the Disting to perform their own functions.

It is our intention to provide an open source code framework into which developers can slot their own algorithms.