CG Products
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Eurorack Module


Analog BBD Delay

This module is no classic echo, but a delay designed for audio rate feedback and sound sculpturing (Karplus-Strong). The 1V/oct. tracking and a feedback CV input makes it suitable for many VCO-like applications, for creating drum and string -like sounds and/or for room ambience. There is a certain amount of noise, as to be expected from analog BBD delay modules, however the Delay1022’s clear and brillant sound in combination with the manually controllable output low pass filter makes this completely tolerable.
Delay 1022 front view
Delay 1022
  • Delay times from 2.5 ms to 50ms (without T CVin)
  • CV controllable delay time (≙ feedback frequency)
    • Good 1V/oct. tracking
  • Feedback CV control input
  • 2nd delay output behind feedback-contolling VCA
    • Delay muting
    • Noise reduction
    • Effect inserts
  • Manually controllable output lowpass (12dB)
    • Noise reduction
    • Sound control
  • Optionally in banana version (on demand)
  • Width: 12 HP
  • Dimensions: 128,5 mm x 60,6 mm
  • Depth: 52mm
  • Supply voltage: ±12V
  • Power consumption: ≈90mA


In1: LFO triggered noise burstsTime knob manually adjusted; BBD switch: 1/2
In1: LFO triggered noise bursts; manually adjusted Lowpass filter settings T CVin 1 (and a little bit Feedback CVin): triangle wave LFO via Sample+Hold
In1: Short decayed noise/squarewave…rhythm machine (with 2 Delay1022s) 1V/oct keyboard (/with Portamento) to T CV in2 1V/oct…envelope generator to Feedback CVin
In1: LFO triggered short decayed noise/squarewave; different lowpass filter settings Sample+Hold with LFO to T CVin 1;
In1: Rhythm machine with XR22VCO – 2 Delay1022s; different CV ins
2 Delay1022s; Inputs: Filtered and gated noise. (Background sound: rhythm machine)

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Delay 1022 drawing
Delay 1022 right side view
Right side view
Delay 1022 left side view
Left side view
Delay 1022 Banana version
Banana version

Audio routing

(Without timebase CV)
Audio routing schematic


Simple patches with other (CG Products‘) modules

Patch Description Audio
Patch: Delay1022 + PEAK&HOLD

1. Delay1022 triggered with short impulses

The dynamic pulse output of the PEAK+HOLD (or any other impulse source) feeding the Delay1022 is a simple way to create percussive drum and string-like sounds.

Patch: Delay1022 + X + PEAK&HOLD

2. Delay1022 triggered with noise-bursts

Better, because allowing more dynamic range and more sound options, is using short noise-bursts or another short envelope-shaped sound source to trigger the delay.

The X multiplier in this example is working as a linear VCA.

Patch: Delay1022 + XR22VCO

3. Delay1022 & XR22 VCO

The combination of the Delay1022 with the XR22 VCO opens up a wide variety of fascinating sounds.

XR22 VCO AM in: Rhythm machine; XR22 VCO frequency modulated with PEAK+HOLD; Delay time modulated with sequencer & 2nd VCO:

Patch: Delay1022 + X on output

4. Delay1022 X modulated With the delay’s FB loop in inversion mode (Switch in lower position ‚inv‘) and the delay’s output amplitude-modulated by itself, a 2nd ‚voice‘ with interesting timbres and exponential dynamic can be produced, useful e.g. in stereo applications.

Delay In: Rhythm machine

Patch: Delay1022 + Pre

5. Delay1022 & Pre

Embed acoustic instruments and sounds via microphone or pickup.

Delay effects, flanging, phasing etc.

Pre In: Microphone/Trumpet …Delay time modulation with sinewave