The Envy Machine DIY Kit is the self-build version of RYK Modular's Envy Machine, a 12 HP Eurorack module with four modulation channels. It covers envelopes, LFOs, random voltages and recorded knob movements. RYK describes it as a natural partner for its four-channel ALGO module. The kit is intended for experienced builders only.
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Five modes per channel: ADSR envelope, AD envelope, AD LFO, random voltage or recordable knob voltage control
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Knob recording: capture hand movements to animate parameters and add timed changes to a patch
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Per-channel MOD input: external CV can control parameters such as time, level and waveshape
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Bipolar attenuverters: on both the modulation inputs and the channel outputs, for unipolar or bipolar use at any level
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Variable waveshape: sweeps continuously through log, expo, sine, trapezoid and square
The time ranges are wide. Envelopes run from 1.5 ms up to 4 minutes and LFOs from 88 Hz down to 7-minute cycles, so a single channel can work as a fast percussive envelope or as very slow movement across a whole piece.
The kit comes with the main PCB, which has all SMD parts already fitted. It also includes a screen-printed 2 mm aluminium panel, encoders, knobs, switches, an LED display PCB, jack sockets, a USB data cable for firmware installation and a Eurorack power cable. To build it you need a good-quality soldering iron with a 2–3 mm tip (a chisel tip is recommended), a mini Phillips screwdriver for M2 and M3 screws, and electrical insulation tape. The PCB is double-sided, so some soldering mistakes can be very hard to correct afterwards.