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The Looping Delay is a clock-based delay for creative synthesis. Not a tape or analog
emulation, but a modern crystal-clear digital delay, the Looping Delay combines features of
delay, looping, and sample-tight synchronization for powerful and dynamic sound capture and
modification. Based on the Dual Looping Delay, the Looping Delay offers the same high-
quality sound in a smaller, single-channel format.
• Stereo or mono mode (Return/Send becomes right channel In/Out in stereo mode)
• 87 seconds maximum delay/loop time in mono, or 43 seconds in stereo.
• 48kHz/24-bit sampling rate, loop recorded at 16-bit
• Extremely quiet, low noise, low jitter design
• Delay and loop time is sync-able to a clock, or a division or multiplication of a clock
• Infinite Hold mode for looping and windowing
• Reverse feature for toggling direction of playback
• Feedback ranges from 0% to 110%
• 1V/octave tracking for Resonant Delays (Karplus-Strong)
• Wet/Dry mix output, as well as dedicated Send/Return for feedback loop
• CV and trigger inputs for all features
Looping Delay
4ms Company
User Manual 1.0 – May 22, 2023
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Summary of Contents for 4ms Company Looping Delay
- Page 1 4ms Company User Manual 1.0 – May 22, 2023 The Looping Delay is a clock-based delay for creative synthesis. Not a tape or analog emulation, but a modern crystal-clear digital delay, the Looping Delay combines features of delay, looping, and sample-tight synchronization for powerful and dynamic sound capture and modification.
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Page 2: Table Of Contents
1. Power off your Eurorack system. 2. On the back of the Looping Delay you will see a 16-pin header labeled “-12V”. The 16-pin header connects to a Eurorack power header using the included power cable. Connect one end of the... -
Page 3: Basic Features
The base clock can also be set by an external clock by patching it into the Ping jack. The Looping Delay requires a base time, which is referred to as a “beat” in this manual. The delay/loop time is mathematically related to the length of one beat. If you are familiar with other 4ms modules, you may be familiar with the concept of “Ping”. - Page 4 Ping jack. The Looping Delay will quantize the external clock to its own sample rate and output quantized clocks on the Loop Clk Out jack. If there is any jitter or drift in the external clock, the Looping Delay will track and follow these discontinuities, which can result in interesting (or noisy!) artifacts.
- Page 5 The Feedback knob sets the amount of signal read from memory to be written ahead in the future. On the Looping Delay, Feedback ranges from 0 to 110%. With no feedback (knob at 0), you will hear one echo. As you turn the Feedback knob up, you will gradually hear more and more echoes (the amount of time before the echoes go to silence will increase).
- Page 6 Delay Feed Knob and CV Jack Delay Feed is the amount of signal from the In jack that's recorded in memory. You can think of it as “Record Level” or “Input Level”, but there is one important detail to remember: Delay Feed doesn't effect the Dry signal (which is what's present on the Audio Out jack when the Mix knob is turned all the way down).
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Page 7: Infinite Hold Vs. 100% Feedback
Infinite Hold vs. 100% Feedback Since setting Feedback to 100% (or close to 100%) and Delay Feed to 0% creates an infinite loop, the Looping Delay acts similarly to how it does when Inf. Hold is on. However, there are a few important differences: When Inf. -
Page 8: Signal Routing: Using Send And Return
Signal Routing: Using Send and Return The Send and Return jacks are simple but offer a wealth of possibilities for creative patching. The Send jack simply carries the delayed signal, unmixed with the input. It’s the same as the main Audio Out jack if the Mix control is set fully clockwise. -
Page 9: Using Cv With Windowing
Listen to your loop, pay attention to what sounds the loop starts with, and what sounds it plays right before it repeats. These are your loop start and stop points. Now, we're going to change those start and stop points by Windowing: 1. -
Page 10: Stereo And Mono Modes
The Looping Delay can also function as a stereo delay by using the Return and Send jacks as right channel input and output, and the In and Audio Out jacks as left channel input and output. -
Page 11: Quantized Change Mode
However, here are some initial things to try if you are having difficulties syncing clocks: • Use the least jittery device as the clock source. Try to use the Looping Delay, or some other high-end gear that guarantees a low-jitter clock. Analog devices generally drift over time. Digital devices can also have jitter due to rounding errors and processor lag or latency. -
Page 12: Patch Ideas
Sound on Sound Looping #1: Creating and Removing Layers With the Looping Delay you can build a loop by layering audio on top of itself. Since the Looping Delay is always recording when not in Inf. Hold mode, each time you add a layer, the audio will be recorded. -
Page 13: Peeling Off Layers
Next, prepare to play a different sound. If this is your first time doing this patch, try to make this sound distinct from the first so you’ll recognize it easily. When you’re ready to play the second sound, turn off Inf. -
Page 14: Granular Scrubbing
SISM's Shift knob up to about 2:00. Patch the SISM channel's output to the Looping Delay’s Feedback CV jack. Now you can activate the “record” CV like in the previous patch to lay down new material, but you can also activate the “clear”... -
Page 15: Special Features
System Settings Mode System Settings Mode allows you to change the way some features of the Looping Delay behave. For novice users, these are not necessary to modify, but advanced users may wish to explore. - Page 16 Time at 16: CFT will be 250ms. Reverse will periodically flash seven times. Any time the Looping Delay’s read and write “heads” jump from one address to another, there is a short cross fade created in order to smooth out the splice. This occurs whenever the Time setting is changed and whenever Reverse or Inf.
- Page 17 Sometimes the tempo may vary by as much as 2-3BPM. Since the Looping Delay is always recording things to be played back in the future, if the tempo changes from when the audio was recorded to when it plays back, it will sound out of time. In order to compensate for this, the Looping Delay has five algorithms that each work with different types of external clock jitter.
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Page 18: Audio Bootloader
Audio Bootloader The Looping Delay contains a bootloader that is used to update the firmware by playing an audio file into the In jack on the left side of the module. Firmware audio files can be downloaded from the 4ms website at https://4mscompany.com/ld... -
Page 19: Hardware Test Mode
The Hardware Test Mode is a way to verify your hardware is working correctly. This procedure is run on every unit at the factory. If you built the Looping Delay as a DIY Kit, or if you suspect damage occurred to your unit, you can run this procedure to verify the module is working properly. - Page 20 Page...