Thonk Synth Triple Mod

Name: Triple Mod
Brand: Thonk Synth

12 HP Eurorack module

Triple Mod is a three-channel modulation source. Every channel can operate as a CV-controlled attack/decay envelope; Channel A also provides an LFO, Channel B a Turing Machine sequencer, and Channel C Sample & Hold or slew processing.

Features

Three independent attack/decay envelope channels provide CV control, looping, selectable slope shapes, Trigger/Gate behavior, and end-of-cycle outputs.
End-of-cycle signals are normalized from Channel A to Channel B and from Channel B to Channel C.
Patching a channel’s Trigger input breaks its incoming normalization.
Envelope looping disables the affected channel’s incoming end-of-cycle normalization.
Loop-button settings persist between mode changes, and channel modes and settings persist across power cycles.
While a mode change is pending and the LEDs flash, the channel ignores knob and switch changes; their new settings take effect immediately upon release.
Channel C full-wave rectifies negative Sample-input voltages in its alternate mode.
Remember: switch off the Eurorack power supply before installation and align the cable’s red stripe with the red marking on the module. Reverse-polarity protection is included.

Controls & Jacks (39)

Channel A Loop / Mode— Toggles continuous envelope looping; holding the button switches Channel A between Envelope and LFO modes. Holding all three Loop buttons re
Channel C Fall Slew— Sets Channel C's envelope decay or fall time from under 1 ms to 15 seconds.
Channel C Rise Slew— Sets Channel C's envelope attack or rise time from under 1 ms to 15 seconds.
Channel B Rise / Length— Sets Channel B's envelope attack or rise time from under 1 ms to 15 seconds.
Channel A EOC Output— Emits a 1 ms +5 V trigger when Channel A completes an envelope cycle or is retriggered during decay; it is normalized to Channel B's Trigger
Channel A CV 2 / Skew CV Input— Bipolar ±5 V control input summed with Channel A's Decay knob.
Channel A Rise / Frequency— Sets Channel A's envelope attack or rise time from under 1 ms to 15 seconds.
Channel B Fall / Lock— Sets Channel B's envelope decay or fall time from under 1 ms to 15 seconds.
Channel C Loop / S&H-Slew— Toggles continuous envelope looping; holding the button switches Channel C between Envelope and Sample & Hold/Slew modes. Holding all three
Channel C EOC / Pulse Output— Emits a 1 ms +5 V trigger when Channel C completes an envelope cycle or is retriggered during decay.
Channel A Fall / Skew— Sets Channel A's envelope decay or fall time from under 1 ms to 15 seconds.
Channel C CV 2 / Slew CV Input— Bipolar ±5 V control input summed with Channel C's Decay knob.
Channel C CV 1 / Sample Input— Bipolar ±5 V control input summed with Channel C's Attack knob.
Channel A Mode Indicator— Bi-color status LED: orange indicates Envelope mode and white indicates Channel A's LFO mode; it flashes during a mode change.
Channel B CV 2 / Lock CV Input— Bipolar ±5 V control input summed with Channel B's Decay knob.
Channel A Modulation / LFO Output— Outputs Channel A's 0–5 V attack/decay envelope.
Channel B CV 1 / Length CV Input— Bipolar ±5 V control input summed with Channel B's Attack knob.
Channel B Loop / Range— Toggles continuous envelope looping; holding the button switches Channel B between Envelope and Turing Machine modes. Holding all three Loop
Channel C Trigger / Hold Input— Accepts triggers or gates to start, retrigger, or hold Channel C's envelope; breaks the normalization from Channel B's EOC Output.
Channel A Trigger / Reset-Hold Input— Accepts triggers or gates to start, retrigger, or hold Channel A's envelope.
Channel B EOC / Pulse Output— Emits a 1 ms +5 V trigger when Channel B completes an envelope cycle or is retriggered during decay; it is normalized to Channel C's Trigger
Channel C Modulation / S&H-Slew Output— Outputs Channel C's 0–5 V attack/decay envelope.
Channel C Mode Indicator— Bi-color status LED: orange indicates Envelope mode and white indicates Channel C's Sample & Hold/Slew alternate mode; it flashes during a m
Channel B Modulation / Turing Output— Outputs Channel B's 0–5 V attack/decay envelope.
Channel B Slope Shape— Selects linear envelope slopes or logarithmic attack with exponential decay.
Channel B Trigger / Clock Input— Accepts triggers or gates to start, retrigger, or hold Channel B's envelope; breaks the normalization from Channel A's EOC Output.
Channel A CV 1 / Frequency CV Input— Bipolar ±5 V control input summed with Channel A's Attack knob.
Channel B Output— Indicates the instantaneous voltage level at Channel B's main modulation output.
Channel B Mode Indicator— Bi-color status LED: orange indicates Envelope mode and white indicates Channel B's Turing Machine mode; it flashes during a mode change.
Channel C Slope Shape— Selects linear envelope slopes or logarithmic attack with exponential decay.
Channel C Loop / S&H-Slew Indicator— Lights orange while Channel C envelope looping is enabled and flashes during a mode change.
Channel A Slope Shape— Selects linear envelope slopes or logarithmic attack with exponential decay.
Channel A Trigger / Gate— Selects Trigger mode, which always completes a full envelope cycle, or Gate mode, which holds the output high until the gate is released.
Channel B Loop / Range Indicator— Lights orange while Channel B envelope looping is enabled and flashes during a mode change.
Channel C Output— Indicates the instantaneous voltage level at Channel C's main modulation output.
Channel B Trigger / Gate— Selects Trigger mode, which always completes a full envelope cycle, or Gate mode, which holds the output high until the gate is released.
Channel C Trigger / Gate— Selects Trigger mode, which always completes a full envelope cycle, or Gate mode, which holds the output high until the gate is released.
Channel A Output— Indicates the instantaneous voltage level at Channel A's main modulation output.
Channel A Loop / EOC-Square Indicator— Lights orange while Channel A envelope looping is enabled and flashes during a mode change.

How-To Guides

Switch Channel A to LFO mode
Create a Turing Machine sequence
Sample and slew a voltage
Cascade all three envelopes

Explore the interactive Triple Mod panel on BleepDex — tap any control to learn what it does.