Jam Jam#

Four-channel trigger and gate processor with three modes.


Jam Jam is a four-channel trigger and gate processor with three modes: Random, Clock Phase, and Gate Delay. JJ is so versatile, you’ll find use for it in every patch.

Add a bit of variety to your patch with Random mode: use four channels of individually adjustable probability to process gate or trigger patterns.

Use Clock Phase mode to add some organic feel to your sequences—or break them in and out of sync completely.

Gate Delay mode is a powerful timing tool useful for anything from precise adjustments for latency compensation to big changes for creative patching: delay events from sub-millisecond adjustments to huge delays of over 15 seconds.

Jam Jam is a musical and fun utility you won’t want to be without. And with voltage control over each channel in all modes, Jam Jam is a completely new way to work with binary signals in your patches.

  • Type: Trigger/gate/clock processor
  • Size: 6 HP
  • Depth: .9 inches
  • Power: 2x5 Eurorack
  • +12 V: 40mA
  • -12 V: 10mA


Jam -- from English: "to improvise on a musical instrument with a group; to take part in a jam session"

Jam -- from English: "a difficult situation or state of affairs"

or Jam -- from British English: "a fruit spread; very delicious on toast with tea"

"A difficult jam session (we’ve all been there) but there are great snacks"


Power connector

To power your Noise Engineering module, turn off your case. Plug one end of your ribbon cable into your power board so that the red stripe on the ribbon cable is aligned to the side that says -12 V and each pin on the power header is plugged into the connector on the ribbon. Make sure no pins are overhanging the connector! If they are, unplug it and realign.

Line up the red stripe on the ribbon cable so that it matches the white stripe and/or -12 V indication on the board and plug in the connector.

Screw your module into your case before powering on the module. You risk bumping the module's PCB against something metallic and damaging it if it's not properly secured when powered on.

You should be good to go if you followed these instructions. Now go make some noise!

A final note. Some modules have other headers -- they may have a different number of pins or may say "not power". In general, unless a manual tells you otherwise, do not connect those to power.

Input & output voltages#

Jam Jam’s trigger inputs have a threshold of about 1.8 V. Its trigger outputs are about 6 V. Its CV inputs have a range of 0 V to +5 V; CV outside of this range will not harm the module but will be clipped.


The Jam Jam interface

Jam Jam is a four-channel trigger and gate processor with three modes. The mode behaviors are described below. Mode selection applies to all four channels, but channel values can be edited separately. Each channel has a button that enables or disables it for editing; when a channel is enabled for editing, the LED next to its button will flash, and turning the encoder will change its settings. Multiple channels can be adjusted at the same time. If multiple channels are set to different values and then edited simultaneously, the encoder will respect the difference in their settings as they are adjusted further.

In 1-4
Gate/trigger/clock inputs. Pulsewidth is respected in all modes (minimum 5ms). Inputs are normalled top to bottom. Patching to an input breaks normaling from channels above.
Out 1-4
Gate/trigger outputs.
CV in 1-4
CV inputs for each channel. Responds to 0 V - 5 V.
Channel buttons 1-4
Used to select which channels are edited by the encoder. Channel selection does not affect CV response. Channel LEDs flash when selected.
Resets selected channels to minimum. Tapping again after resetting takes selected channels to their previous settings.
Edit (encoder)
Adjusts selected channels. Press and turn for coarse adjustments, or turn for fine tuning. Channel behavior varies depending on mode (described below).
Mode select switch.
  • Rnd (Random): A probability mode. Randomly skips gates. The encoder and CV input adjusts likelihood that a gate will be passed through, from 0% to 100%. Tracks the incoming gate pulse width (minimum 5mS).
  • Phs (Clock Phase): Different from a traditional trigger delay, this algorithm adjusts the phase of an incoming clock based on clock period, useful for creating slightly out-of-sync and varied sequencer timing. The encoder and CV input adjust phase offset. The algorithm used for phasing keeps track of incoming pulses and compensates for incoming modulation, so sequencers will be kept in sync even with extreme modulation and high BPMs (over 80hz/200 BPM at 24ppqn). It also tracks pulse width of incoming clock signals (minimum 5mS).
  • Dly (Gate Delay): A simple trigger/gate delay. The encoder and CV input adjust delay time, from roughly 50uS (0.05mS) to over 15s. The delay tracks incoming gate pulse width (minimum 5mS).

Patch tutorial#

Wobbly clocks
Requirements: clock, sequencers, LFO (optional) Set JJ to Phs mode. Patch a clock to In 1. Patch the outs to up to four different sequencers. Adjust their phase with the encoder to move sequencers slightly out of phase. Or, patch in slow attenuated LFOs to the CV inputs to make sequencers fall in and out of phase.

An illustration of the patch above

Requirements: attenuator, clock, mult, clock divider (or a clock generator with divided outs like Horologic Solum) Set JJ to Phs mode. Mult a clock to JJ’s In 1 and a clock divider. Patch a /2 version of the clock through an attenuator and into JJ’s CV 1. Adjust the attenuator to increase the amount of swing coming out of JJ’s Out 1.

An illustration of the patch above

Arpeggiated chords
Requirements: trigger/gate sequencer, 2-4 voices Set JJ’s mode to Dly. Patch a trigger or gate pattern to JJ’s In 1 and Outs 1-4 to four different voices, tuned to a chord. Set channels 2-4 to consecutively longer delay times. Each time JJ is triggered, your chord will be played as an arpeggio.

An illustration of the patch above

Basic random
Requirements: gate/trigger sequencer, voice Set JJ’s mode to Rnd. Patch a gate pattern to JJ’s In 1. Patch Out 1 to the gate input of a voice. Adjust the channel setting to change the probability that each gate signal is passed from the input to the output.

An illustration of the patch above

Clock-influenced random
Requirements: trigger sequencer, clock divider Set JJ’s mode to Rnd. Patch a quick trigger pattern to In 1. Adjust channel 1’s probability to be very low (passing through one out of every ten triggers, for example). Patch a slow clock division (like /4 or /16) to CV 1. When the clock is high the trigger pattern will pass through unaffected, but when it is low only the occasional trigger will be output. This is useful for creating sequence-related fills in a patch.

An illustration of the patch above

Design notes#

In October of 2020, JJ Abrams emailed to ask about a module that could do phase delays. After 17 emails back and forth, we were convinced that what he was interested in didn’t exist on the market, but hey, we knew some people who might be able to make it happen.

At the beginning, it seemed like one of those charmed modules. We designed a module pretty quickly and had room for more modes. More emails ensued. Ideas were solidified. Prototypes were built. It was all moving along fast and simple.

And then when we were pretty much ready to go to production when the microprocessor that this module (and several others we had in the pipeline) is built on disappeared.

It was obnoxious. Several things were delayed; one of the modules we were excited about got canned because by the time we could release it, there were other, more cost-competitive products out there. But this one? This one we are excited about.

When JJ asked about it, we thought it would be cool, but once we had it running, we couldn’t believe what this thing could do. Markus has never gotten distracted from testing this because they were just playing…nope, not at all. It’s got all the things we love here at NE: small footprint, immediate usability, tons of functionality. Get Jammin with Jam Jam.


We will repair or replace (at our discretion) any product that we manufactured as long as we are in business and are able to get the parts to do so. We aim to support modules that have been discontinued for as long as possible. This warranty does not apply to normal wear and tear, including art/panel wear, or any products that have been modified, abused, or misused. Our warranty is limited to manufacturing defects.

Warranty repairs/replacements are free. Repairs due to user modification or other damage are charged at an affordable rate. Customers are responsible for the cost of shipping to Noise Engineering for repair.

All returns must be coordinated through Noise Engineering; returns without a Return Authorization will be refused and returned to sender.

Please contact us if you think one of your modules needs a repair.

Special thanks#

  • JJ Abrams
  • The parts gods who smiled upon us and finally gave us the chips for this module after almost 2.5 years.