The mk4 builds on the previous mk3 and adds these new features:
- a dot matrix display, making menu navigation, parameter selection etc. a breeze.
- a front panel accessible MicroSD card slot.
- compatibility with the Macro Machines Storage Strip.
- an internal precision clock allowing new algorithms such as a tuner, and pitch and frequency references.
The new version is largely software-compatible with the mk3, and the intention is to continue releasing new features for both the mk3 and mk4 in parallel.
X & Y inputs, A & B outputs:
ADC: 24 bit, THD+N -93dB, Dynamic range 99dB, SNR 99dB
DAC: 24 bit, THD+N -94dB, Dynamic range 105dB, SNR 104dB
Sample rate: 75kHz
Z input sample rate: 75kHz
CPU: Microchip PIC32MX at up to 50MHz, hackable, open source code framework available.
There are currently 5 'banks' of algorithms. The first 16 ('classic disting') are:
Precision Adder with integer voltage offsets
Four Quadrant Multiplier with integer multiply/divide
Comparator with adjustable hysteresis
Sample and Hold with noise source and adjustable slew rate
Slew Rate Limiter with linear and exponential slew
Quantizer with selectable scales
Pitch and Envelope Tracker
Dual Waveshaper - wavefolder and triangle-to-sine shaper
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 second bank contains:
Precision Adder with fractional voltage offsets
Resonator for drum synthesis
State Variable Filter (smoothly variable filter type)
Voltage Controlled Delay Line (vibrato/chorus/flange effects)
Tape Delay with voltage controlled tape speed
Clockable Ping Pong Delay (with or without with input pan control)
Vocoder (12 band)
Phaser (up to 10 stages)
The third bank contains:
Single and Dual AR Envelopes (with or without push)
AR Envelope & VCA (with or without push)
Clockable AD Envelope (with mute, gate or trigger)