Expert Sleepers Disting mk4 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 Expert Sleepers Disting mk4 is also a sample (WAV) file and MIDI file player, with a variety of options for sample triggering, playback speed etc.

There are currently 63 distinct algorithms. The first 16 (‘classic disting’) are:
– Precision Adder with integer voltage offsets
– Four Quadrant Multiplier with integer multiply/divide
– Full-wave Rectifier
– Minimum/maximum
– Linear/Exponential Converter
– Quantizer with selectable scales
– Comparator with adjustable hysteresis
– Dual Waveshaper wavefolder and triangle-to-sine shaper
– Sample and Hold with noise source and adjustable slew rate
– Slew Rate Limiter with linear and exponential slew
– Pitch and Envelope Tracker
– Clockable Delay/Echo
– LFO with through zero frequency control and waveshaping
– Clockable LFO with multiply/divide and waveshaping
– VCO with linear FM sine and saw outputs
– VCO with waveshaping saw/triangle and pulse outputs

The remaining algorithms are:
– Precision Adder with fractional voltage offsets
– Voltage Controlled Delay Line vibrato/chorus/flange effects
– Clockable Ping Pong Delay
– Clockable Ping Pong Delay with input pan control
– Resonator for drum synthesis
– Vocoder 12 band
– Phaser up to 10 stages
– Bit Crusher
– Tape Delay with voltage controlled tape speed
– State Variable Filter smoothly variable filter type
– LP/HP Filter
– LP/BP Filter
– BP/HP Filter
– BP/Notch Filter
– AR Envelope
– AR Envelope (with push)
– AR Envelope & VCA
– AR Envelope & VCA (with push)
– Dual AR Envelope
– Dual AR Envelope (with push)
– Euro to Buchla Converter
– Buchla to Euro Converter
– Clockable AD Envelope (with mute)
– Clockable AD Envelope (with gate)
– Clockable AD Envelope (with trigger)
– Clockable AD Envelope & VCA
– Shift Register Random CVs
– Shift Register Random Quantized CVs
– Shift Register Random Triggers
– Shift Register Random Dual Triggers
– ES-1 Emulation
– ES-2 Emulation
– Pitch Reference
– Frequency Reference
– Tuner
– Crossfade/Pan

The functions relating to playing back audio and MIDI files from the MicroSD card are:
– Audio Playback
– Clocked Audio Playback
– Audio Playback with V/Oct
– Audio Playback with Z Speed
– MIDI File Playback (Clocked)
– MIDI File Playback (Free Running)
– Audio Playback with End CV

The Expert Sleepers Disting mk4 was introduced 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
– MIDI in/out ports (on a breakout header)

The Expert Sleepers 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.

Expert Sleepers Disting mk4 Expert Sleepers Disting mk4


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