EuroDDL - Eventide Audio

Designed for performance, the EuroDDL features external control of every feature and function. It has also been designed to sound less digital than the average delay. Eventide’s old school design strictly limits the amount of digital circuitry to only what’s required for delay. Soft saturation clipping, low pass filter, feedback, insert loop, and +20 dB boost are all analog. Once you hear it, you’ll know why this is the ultimate, most musical, Eurorack delay. To be a true performance instrument, all the controls of the Eurorack module must be remote-controllable; the EuroDDL does just that with jacks to accept control voltages and triggers. It’s designed to be played like an instrument and to ‘play nice’ in the rack with Return/Send and Clock In/Clock Out.

Built on History from the Originators

This Eurorack delay is well-steeped in history. Its ancestry dates back to 1971 when we created the world’s first 1745 Digital Delay Line. Back then, everything in audio was analog except delay, which is why our original delay line was used to sync the audio feeds to the speaker towers at the legendary 1973 Watkins Glen concert. Now, that history has been updated to breathe life into your Eurorack. It’s the perfect companion for synthesis and any other instrument.


  • A 16hp Eurorack delay with minimal digital circuitry. It’s constrained to do nothing more than simple, yet flexible, delay.
  • The DDL is pristine. It’s long. It’s short (0.11msec resolution). It’s smooth, it loops and it goes backwards.
  • The delay converter is 24 bits with max delay up to 10 seconds at 192 kHz sample rate and 160 seconds at 16 kHz rate.
  • Delay time can be varied smoothly and over a wide range; either manually, via tap tempo or by remote control voltage.
  • Short delays can be used for comb filter and flanging effects. Longer delays for echo effects.
  • Infinite delays for looping. Backwards delays for reverse effects.
Euro DDL Quick Resource Guide

Understanding the Tap Button and Divider Tap

Tap Button and Divider Tap to enter delay. Display will show BPM while tapping. Push + hold Tap button to set the Tap divider. The divider can be set from 16th note triplets (Delay is 1/12th of Tap rate) to 4 bars (Delay is 16 times Tap rate). For example, some of the available dividers are:

[1.4] – Quarter note
[1.8] – Eighth note
[1.2] – Half note
[4.4] – Whole note
[1.5b] – Dotted whole
[2b] – 2 bars
[2.5b] – 2.5 bars
4b] – 4 bars

[1.4d] – Dotted 1/4 (3/8)
[1.8d] – Dotted 1/8 (3/16)
[16d] – Dotted 1/16 (3/32)
[32d] – Dotted 1/32 (3/64)
[16t] – 1/16th note triplets
[1.8t] – 1/8th note triplets
[1.4t] – Quarter note triplets
[4.4 t] – Whole note triplets

System Mode

Hold delay knob and tap button for 3 seconds to enter and exit. Turn encoder to select parameter. Push encoder to change. Push encoder again to return to parameter list.

[1.TG] – Set T/G inputs to respond to Trigger or Gate control > (trg or gat)
[2.FS] – Set max Feedback level > (95 to 110)
[] – Software Version

System Reset:
To recall factory defaults, power up while holding down REVERSE button. The display will show [ ini ] . 

CLK Out is active after TAP is pressed. The TAP function generates the CLK Out BPM rate. If CLK IN is present its value is passed to CLK OUT. TAP function is ignored when CLK In and/or CV DELAY are active. The CV DELAY input overrides CLK In.

Download the entire Euro DDL Quick Resource Guide PDF


From origins to the future!

The EuroDDL is a direct link from the origins of digital delay to the undreamed of the future!

Chris Koltay
Tape Op

Adventurous sounds

The combination of onboard controls, built-in filter and openness to CV modulation makes EuroDDL capable of creating quite adventurous sounds, and it’s a great Eurorack partner to bring delay to your system.

Hollin Jones

Artists Using EuroDDL

Bryan Noll
Richard Devine
Schematic Records
Drew McDowall


Sample Rate

192kHz to 12kHz


24 bits

Minimum Delay

0.11 milliseconds

Maximum Delay

10 seconds @ 192kHz / 160 seconds @ 12kHz


Max 20dBu, 100kΩ impedance


Max 20dBu, 22kΩ impedance

Insert Send

Max 16dBu, 2kΩ impedance

Insert Return

Max 20dBu, 50kΩ impedance


+12V 200mA, -12V 100mA