Muta Jovis#

Switchable quad mute


Muta Jovis is a 4HP switchable quad mute. The inputs are circularly normalled so a single input can be sent (and muted) to up to four outputs. Switches and LEDs that indicate channels that are outputting signal leave no doubt about the state of each channel. MJ acts as an unbuffered mult and was designed with gates/triggers in mind.

  • Type: Quad Mute
  • Size: 4HP Eurorack
  • Depth: .8 inch
  • Power: 2x5 Eurorack
  • +12 V: 0 mA to 30 mA
  • -12 V: 0 mA to 30 mA


Muta -- from Latin mute

Jovis -- from Latin sky god

"Skyler's mute"

Input & output voltages#

Muta Jovis's inputs and outputs are rated for -10 V to 10 V.


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.


illustration of Muta Jovis' interface

Four inputs correspond to the numbered switch (left side of module). Inputs are normalled circularly.
Outputs (right side of module). When the switch is muted, it output is connected to ground. When not muted, it connects to the input jack.
Left is mute; right allows the signal to pass to the output.

Patch tutorial#

Patch up to four gate signals into the inputs. Patch the outputs to triggered oscillators and play with bringing parts in and out as you desire.

Passive mode#

If used without power, Muta Jovis will function as a quad mute, but no LEDs will illuminate. However, all other functionality remains.

Design notes#

We developed this module with Skyler King of Buck Modular many, many moons ago. Then we sat on the design for a long time, when other things (like the BIA) took priority. Eventually, people just asked for this simple utility. At Knobcon 2017, we talked to Konstantin Gervis (@zv.k.techno)about the module and he really gave us the kick we needed to dust off the design. Skyler gave us his blessing to produce the module, and we were on our way.


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#

  • Skyler "Kittyspit" King
  • Konstantin Gervis