Befaco Motion MTR
Three-channel CV/audio attenuator with circular LED metering and built-in mix output.
6 HP Eurorack module
Motion MTR (also called the Molten Motion Meter, or MMM) is a three-channel CV/audio utility that pairs each attenuator with a circular LED meter ring. Each channel has a knob, a 3-position mode switch (Audio, CV ATT, CV INV), an input normalled to +10V, and its own output. Channels 1 and 2 are normalled into Out 3 to form a 3-channel mixer. The LED rings turn modulation visible — purple for positive voltages, orange for negative, and a green/yellow/red VU response in Audio mode.
Features
- Three-channel CV / audio attenuator
- Per-channel circular LED meter ring (~20 LEDs)
- Audio mode: green / yellow / red VU response
- CV ATT mode: purple (positive) / orange (negative) bipolar metering
- CV INV mode: signal inversion before output and meter
- Three-position mode switch per channel
- Inputs normalled to +10V — knobs double as voltage sources
- Out 1 and Out 2 normalled into Out 3 mix bus
- Out 3 acts as standalone Channel 3 output when other outs are patched
- Designed by Robin Vincent (Molten Modular)
- First Befaco x Molten Modular collaboration
- 6 HP, 30 mm depth (skiff-friendly)
Controls & Jacks (15)
- Ch 1 Mode— 3-position mode switch: Audio (VU meter) / CV ATT (attenuator) / CV INV (inverted attenuator). Sets how the LED ring visualises the signal a
- Ch 1 Level— Channel 1 attenuator. Scales input from 0 to full (or up to 10V if input unpatched, since input normals to +10V). LED ring shows the resulti
- Ch 1 Meter— Circular LED ring around Ch 1 knob. Visualises the post-attenuator output: green/yellow/red VU in Audio, purple (positive) / orange (negativ
- Ch 2 Level— Channel 2 attenuator. Scales input from 0 to full (or up to 10V if input unpatched, since input normals to +10V). LED ring shows the resulti
- Ch 2 Mode— 3-position mode switch: Audio (VU meter) / CV ATT (attenuator) / CV INV (inverted attenuator). Sets how the LED ring visualises the signal a
- Ch 2 Meter— Circular LED ring around Ch 2 knob. Visualises the post-attenuator output: green/yellow/red VU in Audio, purple (positive) / orange (negativ
- Ch 3 Mode— 3-position mode switch: Audio (VU meter) / CV ATT (attenuator) / CV INV (inverted attenuator). Sets how the LED ring visualises the signal a
- Ch 3 Level— Channel 3 attenuator. Scales input from 0 to full (or up to 10V if input unpatched, since input normals to +10V). LED ring shows the resulti
- Ch 3 Meter— Circular LED ring around Ch 3 knob. Visualises the post-attenuator output: green/yellow/red VU in Audio, purple (positive) / orange (negativ
- In 1— Channel 1 input. Normalled to +10V — leave unpatched to use the channel as a fixed-voltage source scaled by Ch 1 Level.
- In 2— Channel 2 input. Normalled to +10V — leave unpatched to use the channel as a fixed-voltage source scaled by Ch 2 Level.
- In 3— Channel 3 input. Normalled to +10V — leave unpatched to use the channel as a fixed-voltage source scaled by Ch 3 Level.
- Out 1— Channel 1 output. Carries the attenuated/inverted signal. When unpatched, sums into Out 3.
- Out 2— Channel 2 output. Carries the attenuated/inverted signal. When unpatched, sums into Out 3.
- Out 3 (Mix)— Channel 3 output and mix bus. Sums the unpatched outputs of channels 1 and 2 with channel 3's own signal — patching Out 1 or Out 2 removes t
How-To Guides
- Audio level metering on a send
- Visual attenuverter with offset
- Three-channel mixer with visual feedback
- Filter control room (designer''s favourite patch)
- Headroom monitoring across three sends
- Visual modulation depth control
Explore the interactive Motion MTR panel on BleepDex — tap any control to learn what it does.