ECR-1 Eurorack Convolver

We originally designed this module to offer the Eurorack community access to long and lush natural stereo reverbs, and to allow tweaks in real-time with minimal delay. But it goes well beyond a mere reverb module.

The ECR-1 offers various modulation options: for instance, the position in the response sample, allowing for filter-like sweeps. Another example is modulating between two reverb spaces. It’s even possible to pitch bend the response sample in real-time. Want to record your own response and use that right away? No problem. That’s what a modular system is for, right?

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Schematic overview of the ECR-1 User interface

For the manual, and other resources, please see the ECR-1 downloads page.

– Long true-stereo natural reverbs (23 seconds max).
– Dual simultaneous reverbs (foreground and background).
– Multi-channel display with envelope and parameter-value overlays, and a clipping indicator.
– Predictive gain control (to preemptively stop the output from blowing up).
– Stereo or dual-mono input, accepts line level or Doepfer Eurorack level. Adjustable using gain control knob.
– Separate dry and wet knobs.
– Attack-Release Envelope with direct controls (2 knobs).
– Cross fade knob (cross fades between the foreground and background response)
– Pre-delay up to 2 seconds.
– Rotary encoder to quickly select responses (internal presets and the ones present on USB/SD).
– High-pass (12 dB/oct) filter with adjustable cutoff.
– Real-time pitch adjustment of response (-2 .. +2 octave).
– Dual mono (stereo pair) output.
– Record responses to USB / SD.
– Use responses from USB / SD.
– 4 modulation CV’s:
– Response sample position
– Crossfade
– Stereo width
– Wet
– Audition feature to quickly evaluate responses.
– High quality ALPS potentiometers.
– 1.5″ color display that’s perfectly viewable from all angles

– 48 kHz stereo input (90 dB SNR) and output (100 dB SNR)
– 1.5″ true color 128×128 pixel OLED
– USB2.0 port with Micro SD card adapter, SD card included.
– Saves samples as 32 bit float stereo WAV files.
– 10 bit resolution and ~50 Hz refresh on potentiometer action.
– +12V, -12V powered (5V busboard line not used)
– Measurements:
– 130 mm / 25.6 HP wide
– approx 5cm deep (counting from the front plate)
– Scratch proof and solvent proof anodized front plate.

Power consumption:
+12V: 180 mA (idle) – 400 mA (longest reverbs and continuously modulating)
-12V: 21 mA

Recommended retail price:
499 EUR

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