4ms/looping-delay
Looping Delay
Clock-based digital delay combining delay, looping, and sample-tight synchronization. Features infinite hold looping, reverse playback, windowing/scrubbing, up to 87 seconds mono loop time, stereo mode, Send/Return effects loop, and Karplus-Strong resonant delay support.796
Capabilities 3
- Clock Sourceclock-source
- Outputs a highly stable, sample-rate-quantized master clock and a loop clock. Jitter less than 0.0001% at 120BPM.796
- Digital Delaydigital-delay
- Crystal-clear clock-synced digital delay with up to 87 seconds mono / 43 seconds stereo. Feedback up to 110%, Delay Feed control, windowing/scrubbing in Infinite Hold mode, Karplus-Strong resonant delay support.796
- Looperlooper
- Infinite Hold mode freezes recording and plays back a fixed loop with adjustable start/end points via windowing.796
Jacks 13 — 9 in / 4 out
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (9) | |||
| Delay Feed CV | cv | 0V to 5V | CV control of Delay Feed (record level). Added to knob setting; combined max is 100%. Negative voltage ignored.796 |
| Feedback CV | cv | 0V to 5V | CV control of Feedback level. Added to knob setting; combined max is 110%. Also controls windowing when Inf. Hold is active and engaged.796 |
| Hold | trigger | — | Trigger input to toggle Infinite Hold mode. Toggles state on rising edge (configurable to gate mode in System Settings).796 |
| In | audio | -10V to 10V | Main audio input (left channel in stereo mode). AC-coupled.796 |
| Mix CV | cv | 0V to 5V | CV control of Dry/Wet mix. Added to knob setting. Negative voltage ignored.796 |
| Ping | clock | — | External clock input. One beat equals the time between the last two pulses received. Sets the base clock for delay/loop time calculations.796 |
| Return | audio | -10V to 10V | In mono mode: FX Return input (summed with main In and internal feedback). In stereo mode: right channel audio input. AC-coupled.796 |
| Reverse Jack | trigger | — | Trigger input to toggle Reverse mode on rising edge (configurable to gate mode in System Settings).796 |
| Time CV | cv | -5V to 5V | Modifies the Time knob's setting by multiplying or dividing its value. In Unquantized Time Mode responds at 1V/octave. Positive CV lengthens delay time; negative CV shortens it.796 |
| Outputs (4) | |||
| Audio Out | audio | -10V to 10V | Dry/Wet mix output (left channel in stereo mode). DC-coupled.796 |
| Clock Out | clock | 0V to 8V | Master clock output, quantized to sample rate, in sync with the Ping/beat clock. Extremely low jitter.796 |
| Loop Clk Out | clock | 0V to 8V | Clock output synchronized to the current loop/delay time. Goes high when the loop starts in Inf. Hold mode.796 |
| Send | audio | -10V to 10V | In mono mode: delay signal output for FX loop (no dry signal). In stereo mode: right channel audio output. DC-coupled.796 |
Parameters 8
| Name | Type | Range | Behavior |
|---|---|---|---|
| Delay Feed Knob | knob | 0% – 100% | Controls how much of the In jack signal is recorded into memory (record level). Does not affect the Dry signal. Has no effect in Infinite Hold mode. Combined with Delay Feed CV; maximum combined value is 100%.796 |
| Feedback Knob | knob | 0% – 110% | Sets amount of delayed signal fed back into memory. 0% = single echo; 100% = infinite loop; 110% = each repeat gets louder. In Inf. Hold mode with button held, controls windowing (scrubbing) of loop position.796 Zones
|
| Inf. Hold Button | button | — | Toggles Infinite Hold mode on release. When on, stops recording and plays a fixed loop. Also used for windowing (hold down while turning Feedback), switching to Unquantized Time Mode (hold while turning Time), and accessing stereo/mono mode change.796 |
| Mix Knob | knob | — | Crossfades between dry (In jack, fully CCW) and wet (memory read, fully CW) on the Audio Out jack. Does not affect the Send jack.796 |
| Ping Button | button | — | Tap to set tempo. One tap equals one beat. Tap twice to establish a beat period. Also used in various button combinations for system settings.796 |
| Reverse Button | button | — | Toggles reverse playback direction on release. In normal mode, swaps read/write positions so previously recorded audio plays backwards while new audio plays forwards. In Inf. Hold mode, reverses loop playback direction.796 |
| Time Knob | knob | 1beat – 16beat | Sets delay/loop time as a number of beats (1-16). Modified by Time Switch and Time CV jack. In Unquantized Time Mode, provides continuous (non-integer) control.796 |
| Time Switch | switch | — | 3-position switch: Center (=) passes Time knob value directly (1-16 beats); Up (+16) adds 16 beats to knob value (17-32 beats); Down (1/8) divides knob value by 8 (1/8 to 2 beats, i.e. eighth notes).796 |
Firmware history 1 version
| Version | Released | Notes |
|---|---|---|
| 1.0 | 2023-06 | Initial release of Looping Delay firmware.796 |
References 2
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[797]
4ms Company Looping Delay product pageproduct_page● verified 2026-05-23