Intellijel Mixup User manual

Mixup Manual
Mixup
Chainable Stereo Audio Utility Mixer
Manual Revision: 2017.12.07

Mixup Manual
Table of Contents
Table of Contents
Overview
Installation
Before Your Start
Installing Your Module
Front Panel
Controls
Inputs & Outputs
Back Panel
Architecture
Technical Specifications
Page 1

Mixup Manual
Overview
Mixup is a versatile, expandable audio mixer for eurorack format. It has six front panel
inputs and two outputs. Inputs 1 and 2 are single-channel mono inputs, each with its own
mute switch and level control; Input 3 is a dual-channel stereo input with a shared mute
and level control; and input 4 is an auxiliary unity-gain, non-mutable stereo input.
Using bus connectors on the back panel, you can chain multiple Mixups together in
series, giving you the ability to mix together even more inputs, or to create sub-mixes for
routing around larger systems.
Because Mixup is designed specifically for audio (and not for CV mixing), it uses
AC-coupled circuitry (which reduces the potential for ‘pops’ when muting and unmuting
audio), and it uses audio-grade, logarithmic attenuators for a smooth, even response
across the entire volume range.

 
Page 2

Mixup Manual
Installation
Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and power
supply.
Before Your Start
Before installing a new module in your case you must ensure your case’s power supply has
sufficient available capacity to power the module:
● Sum up the specified +12V current draw for all modules, including the new one. Do the
same for the -12 V and +5V current draw. The current draw will be specified in the
manufacturer's technical specifications for each module.
● Compare each of the sums to specifications for your case’s power supply.
● Only proceed with installation if none of the values exceeds the power supply’s
specifications. Otherwise you must remove modules to free up capacity or upgrade your
power supply.
You will also need to ensure you have enough free space (hp)  as well as free power headers in
your case to fit the new module.
You can use a tool like ModularGrid to assist in your planning. Failure to adequately power your
modules may result in damage to your modules or power supply. If you are unsure, please
contact us before proceeding.
Installing Your Module
When installing or removing a module from your case always turn off the power to the case and
disconnect the power cable. Failure to do so may result in serious injury or equipment damage.
Ensure the 10-pin connector on the power cable is connected correctly to the module before
proceeding. The red stripe on the cable must line up with the -12V pins on the module’s power
connector. The pins are indicated with the label -12V, a white stripe next to the connector, the
words “red stripe”, or some combination of those indicators.
Page 3

Mixup Manual
Most modules will come with the cable already connected but it is good to double check the
orientation. Be aware that some modules may have headers that serve other purposes so
ensure the cable is connected to the right one.
The other end of the cable, with a 16-pin connector, connects to the power bus board of your
Eurorack case. Ensure the red stripe on the cable lines up with the -12V pins on the bus board.
On Intellijel power supplies the pins are labelled with the label “-12V” and a thick white stripe:
Page 4

Mixup Manual
If you are using another manufacturer’s power supply, check their documentation for
instructions.
Once connected, the cabling between a module and power supply should resemble the picture
below:
Before reconnecting power and turning on your modular system, double check that the ribbon
cable is fully seated on both ends and that all the pins are correctly aligned. If the pins are
misaligned in any direction or the ribbon is backwards you can cause damage to your module,
power supply, or other modules.
After you have confirmed all the connections, you can reconnect the power cable and turn on
your modular system. You should immediately check that all your modules have powered on
and are functioning correctly. If you notice any anomalies, turn your system off right away and
check your cabling again for mistakes.
Page 5

Mixup Manual
Front Panel
Controls
1. LEVEL 1 - This attenuator reduces the IN 1 mono audio level sent to both MIX outputs.
2. LEVEL 2 - This attenuator reduces the IN 2 mono audio level sent to both MIX outputs.
3. LEVEL 3 - This attenuator reduces the IN 3L and IN 3R stereo audio level sent to the
MIX outputs.
Page 6

Mixup Manual
4. MUTE 1 - In the down position, this switch mutes IN 1 — removing it from the MIX
outputs.
5. MUTE 2 - In the down position, this switch mutes IN 2 — removing it from the MIX
outputs.
6. MUTE 3 - In the down position, this switch mutes both IN 3L and IN 3R — removing
them from the MIX outputs.
7. CLIP LED - This LED lights when the sum of all the inputs (from the front panel jacks
plus the rear panel serial bus) causes either side of the stereo MIX output to clip.
Obviously, the more inputs you feed into Mixup (or the more Mixups you feed into each
other), the greater the potential to overdrive the Mix bus. So if the CLIP LED lights,
consider reducing the various LEVEL knobs to maintain a clean output (unless you want
distorted audio, of course).
Inputs & Outputs
A. IN 1 - Mono audio input 1. Mixup routes the audio from IN 1 to both the MIX L and MIX R
outputs. It can be muted with the MUTE 1 switch, and its audio level is determined by the
LEVEL 1 knob.
B. IN 2 - Mono audio input 2. Mixup routes the audio from IN 2 to both the MIX L and MIX R
outputs. It can be muted with the MUTE 2 switch, and its audio level is determined by the
LEVEL 2 knob.
C. IN 3L - This is the left side of stereo audio input 3. Mixup routes the audio from IN 3L to
the MIX L output. It can be muted (along with IN 3R) using the MUTE 3 switch, and its
audio level (along with IN 3R) is determined by the LEVEL 3 knob. If nothing is plugged
into IN 3R, then IN 3L acts like a mono input, and Mixup routes its signal to both the
MIX L and MIX R outputs.
D. IN 3R - This is the right side of stereo audio input 3. Mixup routes the audio from IN 3R
to the MIX R output. It can be muted (along with IN 3L) using the MUTE 3 switch, and its
audio level (also along with IN 3L) is determined by the LEVEL 3 knob. If you wish to
use input 3 for mono instead of stereo, simply plug a mono signal into the IN 3L jack,
and leave the IN 3R jack unconnected.
E. IN 4L - This is the left side of stereo audio input 4. Mixup routes audio directly from IN 4L
to the MIX L output, and has neither a mute switch nor a level knob. If nothing is plugged
into IN 4R, then IN 4L acts like a mono input — appearing at both the MIX L and MIX R
outputs.
F. IN 4R - This is the right side of stereo audio input 4. Mixup routes audio directly from
IN 4R to the MIX R output, and has neither a mute switch nor a level knob. If you wish to
Page 7

Mixup Manual
use input 4 for mono instead of stereo, simply plug a mono signal into the IN 4L jack,
and leave the IN 4R jack unconnected.
G. MIX L - This is the mixed audio output of all audio on Mixup’s left bus. This includes
audio from IN 1, IN 2, IN 3L, IN 4L, plus all left-channel audio from other Mixups you
might connected to its back panel CHAIN-IN connector.
H. MIX R - This is the mixed audio output of all audio on Mixup’s right bus. This includes
audio from IN 1, IN 2, IN 3R (or IN 3L if IN 3R is not connected), IN 4R (or IN 4L if IN 4R
is not connected), plus all right-channel audio from other Mixups you might connect to its
back panel CHAIN-IN connector.

 
Page 8

Mixup Manual
Back Panel
Each Mixup module features a pair of rear panel connectors, which enable you to serially
connect multiple Mixups to create a larger mixer with more inputs.
1. CHAIN OUT - This connector taps into the Left and Right MIX bus outputs. Use the
supplied link cable to connect the CHAIN OUT of one Mixup to the CHAIN IN connector
on another Mixup.
2. CHAIN IN - This connector adds another pair of inputs directly to the Left and Right MIX
bus. Use the supplied link cable to connect the CHAIN IN of one Mixup to the
CHAIN OUT connector on another Mixup. The CHAIN IN connector is essentially
another input much like  “Input 4.”
NOTE  :   Never   use   the   3-wire   link
cable   to   connect   a   Mixup
module   to   an   Intellijel   Pedal I/O
module.   Although   both   modules
use   this   same   cable/connector
—   they   serve   different   purposes
and   carry   different   signals.
Page 9

Mixup Manual
Architecture


Page 10

Mixup Manual
Technical Specifications
Width
6 hp
Maximum Depth
29 mm
Current Draw
15 mA @ +12V
16 mA @ -12V
Page 11