ALLEN & HEATH Qu-16 User manual

For Firmware Version V1.0
Check www.allen-heath for the latest version available
Publication AP9031

Qu-16 User Guide 2 AP9031 iss.1b
The Qu range of products complies with the European
Electromagnetic Compatibility directives 2004/108/EC and the
European Low Voltage directives 2006/95/EC.
Any changes or modifications to the equipment not approved by Allen &
Heath could void the compliance of the product and therefore the users
authority to operate it.
Qu-16 User Guide AP9031 Issue 1b
Copyright © 2013 Allen & Heath. All rights reserved
Allen & Heath Limited, Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com
Limited One Year Manufacturer’s Warranty
This product is warranted to be free from defects in materials or workmanship for period of
one year from the date of purchase by the original owner.
To ensure a high level of performance and reliability for which this equipment has been
designed and manufactured, read this User Guide before operating.
In the event of a failure, notify and return the defective unit to the place of purchase. If this
is not possible then please contact the authorised ALLEN & HEATH distributor or agent in
your country as soon as possible for repair under warranty subject to the following
conditions:
Conditions Of Warranty
The equipment has been installed and operated in accordance with the instructions in this
User Guide.
The equipment has not been subject to misuse either intended or accidental, neglect, or
alteration other than as described in the User Guide or Service Manual, or approved by
ALLEN & HEATH.
Any necessary adjustment, alteration or repair has been carried out by an authorised
ALLEN & HEATH distributor or agent.
This warranty does not cover fader wear and tear.
The defective unit is to be returned carriage prepaid to the place of purchase, an
authorised ALLEN & HEATH distributor or agent with proof of purchase. Please discuss
this with the distributor or the agent before shipping.
If the unit is to be repaired in a different country to that of its purchase the repair may take
longer than normal, whilst the warranty is confirmed and parts are sourced.
Units returned should be packed to avoid transit damage.
In certain territories the terms may vary. Check with your ALLEN & HEATH distributor or
agent for any additional warranty which may apply.
If further assistance is required please contact Allen & Heath Ltd.
ALLEN&HEATH

Qu-16 User Guide 3 AP9031 iss.1b
IMPORTANT - Read these instructions before starting:
Safety instructions
Before starting, read the Important Safety Instructions printed on the sheets supplied with the
equipment. For your own safety and that of the operator, technical crew and performers, follow
all instructions and heed all warnings printed on the sheet and on the equipment panels.
System operating firmware
The function of the Qu mixer is determined by the firmware (operating software) that runs it.
Firmware is updated regularly as new features are added and improvements made. This guide
relates to Version 1.0 firmware.
The latest firmware can be downloaded from the Allen & Heath web site, transferred to USB key
and then loaded into the Qu mixer using the Firmware Update utility.
Check the Allen & Heath web site for the latest version of Qu firmware.
Software licence agreement
By using this Allen & Heath product and the software within it you agree to be bound by the
terms of the relevant End User Licence Agreement (EULA), a copy of which can be found on
the Allen & Heath website in the product's pages. You agree to be bound by the terms of the
EULA by installing, copying, or using the software.
Further information
For further information, knowledgebase and technical support please refer to the Allen & Heath
web site.
General precautions
To prevent damage to the controls and cosmetics, avoid placing heavy objects on the
control surface, obstructing movement of the motorised faders, scratching the surface or
touch screen with sharp objects, or rough handling and vibration.
Protect the equipment from damage through liquid or dust contamination. Avoid dust or
small objects getting into the fader slots. Cover the mixer when it is not being used for a
long period.
Computer and touch screen technology can be affected by extreme cold. If the
equipment has been stored in sub-zero temperatures allow time for it to reach normal
operating temperature before use at the venue. Recommended operating temperature
for Qu is 5 to 35 degrees Celsius.
Avoid using the equipment in extreme heat and direct sunlight. Make sure the mixer
ventilation slots are not obstructed and that there is adequate air movement around the
equipment.
Transport the Qu using a touring grade, purpose designed flightcase with adequate
foam lining and internal support for protection.
Clean the control surface with a soft brush and dry lint-free cloth. Do not use chemicals,
abrasives or solvents.
It is recommended that servicing is carried out only by an authorised Allen & Heath
agent. Contact details for your local distributor can be found on the Allen & Heath web
site. Allen & Heath do not accept liability for damage caused by maintenance, repair or
modification by unauthorised personnel.

Qu-16 User Guide 4 AP9031 iss.1b
1. Packed contents
Accessories available
Qu-16 Mixer
Safety Sheets
AP3345 – English
AP7287 – French
AP8513 – Chinese
•Read this before starting
Mains lead •Check this
is correct for your territory
User Guide AP9031
Registration Card on rear cover
•Return the card or register
online at www.allen-heath.com
LEDlamp
Part LEDlampX
Right angled 4-pin XLR
with built-in dimmer
19” Rack Ear Kit
Qu-16-RK19
To mount the Qu-16 in a standard 19” rack
or flightcase. These fit over the plastic
trims.
Please Note
This User Guide refers to first release Qu-16 firmware version V1.0. Several
features are not supported by this release. Please refer to the Allen & Heath
web site for the latest version of firmware and this user guide. For more details
read the Release Notes available with the firmware.
Features not supported by firmware V1.0:
USB key Scene and mixer data transfer
User libraries for FX and processing
Scene Recall Filters and Safes
User assignable Custom layer
Qu-Pad wireless remote app for iPad
dSNAKE port for remote audio connection
ME personal mixer compatibility
User permissions
Note – USB streaming is compatible with a MAC computer only. Windows PC
is not supported.

Qu-16 User Guide 5 AP9031 iss.1b
2. Contents
1.Packed contents .................................................................................................................................4
2.Contents..............................................................................................................................................5
3.Introduction.........................................................................................................................................6
4.Connection Overview..........................................................................................................................7
4.1Input Connections......................................................................................................................7
4.2Output Connections...................................................................................................................8
4.3Other Connections.....................................................................................................................8
4.4Powering up the mixer ...............................................................................................................9
5.Operational Overview .......................................................................................................................10
5.1Fader Strips..............................................................................................................................10
5.2Channel Processing.................................................................................................................12
5.3Working with the Processing: ..................................................................................................12
5.4Channel Routing ......................................................................................................................16
5.5Working with the Routing screens:..........................................................................................16
5.6Mute Groups ............................................................................................................................18
5.7Using the Mute Groups............................................................................................................18
5.8The Master Strip.......................................................................................................................19
5.9Working with the sends on faders: ..........................................................................................20
5.10Copy, Paste, Reset keys..........................................................................................................20
6.Touch Screen Mixing Functions.......................................................................................................21
6.1The Sel screens – Processing and Routing ............................................................................22
6.2Home Screen ...........................................................................................................................22
6.3Home Screen – Changing User...............................................................................................22
6.4Home Screen – Meters ............................................................................................................23
6.5Home Screen – RTA ................................................................................................................23
6.6Home Screen – USB Audio .....................................................................................................23
6.7The FX ......................................................................................................................................26
6.8Working with FX – Adding vocal reverb: .................................................................................28
6.9Scene Memories ......................................................................................................................29
7.Touch Screen Setup Functions ........................................................................................................30
7.1Audio Setup -PAFL...................................................................................................................30
7.2Audio Setup - Talkback ...........................................................................................................30
7.3Audio Setup –Signal Generator...............................................................................................31
7.4Audio Setup – Output Patch ....................................................................................................31
7.5Audio Setup - Global................................................................................................................31
7.6Control Setup - SoftKeys .........................................................................................................32
7.7USB Data..................................................................................................................................32
7.8Network Setup .........................................................................................................................32
7.9Utility - Calibration....................................................................................................................32
7.10Utility – Qu-Drive ......................................................................................................................33
7.11Utility – Firmware Update.........................................................................................................33
8.Resetting the Mixer ...........................................................................................................................34
8.1Reset Mix Settings – A starting point for mixing......................................................................34
8.2System Hard Reset ..................................................................................................................35
9.Specifications....................................................................................................................................36
9.1System Block Diagram ............................................................................................................37
9.2Mechanical Details...................................................................................................................38

Qu-16 User Guide 6 AP9031 iss.1b
3. Introduction
The Qu-16 is a compact, rack mountable digital audio mixer from Allen & Heath.
Building on the heritage of the GLD and flagship iLive digital consoles the Qu
presents exceptional performance together with an intuitive analogue style user
interface with knobs and touch screen, total recall of its settings, full input, output
and FX processing, USB multitrack recording capability and remote wireless control
using an iPad.
16 mono Mic / Line channels with XLR and TRS jack inputs
3 stereo Line channels
4 built-in FX engines with dedicated stereo FX return channels
Talkback mic input
Provides up to 24 simultaneous sources to the mix
16 mix buses – 10 mix, 2 FX, LR, PAFL
12 XLR mix outputs – 4 mono mix + 3 stereo mix + LR
2 channel AES digital output patchable from any mix
Stereo Alt Out TRS jack output patchable from any mix
2TRK output for recording
Input channel linking
Input processing – Preamp, HPF, Gate, PEQ, Compressor, Delay
Mono mix and LR processing – Graphic EQ, Compressor, Delay
Stereo mix processing – PEQ, Compressor, Delay
800x480 colour touch screen for quick control
Motorised faders for sends on faders and mix recall
Master strip for quick access to mix levels and processing
AnaLOGIQ™ recallable analogue preamp
Effects ported from the flagship iLive console
4 assignable SoftKeys
Quick copy and reset of settings and scenes
100 Scene memories
Qu-Drive for stereo and 18-track recording/playback to USB drive
USB streaming to/from a MAC computer (PC currently not supported)
USB key transfer of Scenes and mixer setup (Not supported by V1.0)
User assignable Custom layer (Not supported by V1.0)
Qu-Pad wireless remote app for iPad (Not supported by V1.0)
dSNAKE port for remote audio conection (Not supported by V1.0)
Compatible with ME personal mixing system (Not supported by V1.0)
User permissions to restrict operator access (Not supported by V1.0)

Qu-16 User Guide 7 AP9031 iss.1b
4. Connection Overview
The following connections are available on the rear panel of the Qu-16.
4.1 Input Connections
Mono Line Input – Balanced ¼” TRS (Tip, Ring,
Sleeve) jack input for plugging in line level signals such as
multitrack players and radio mic receivers. To work with
unbalanced sources use a mono jack or link ring to sleeve
within the TRS stereo jack.
Use DI boxes plugged into the Mic input for high
impedance, low level sources such as acoustic instrument
pickups.
Microphone Input – Balanced XLR input for plugging
in a low level source such as a microphone or DI box. 48V
can be switched to the socket for condenser mics and active
DI boxes that require phantom power.
Note - To avoid loud thumps mute the channel before
plugging in cables or switching 48V on or off.
Stereo Line Input – ST1 and ST2 balanced ¼” TRS
(Tip, Ring, Sleeve) jack inputs for plugging in line level
stereo sources such as CD players. The L input normals
(switches) through the R input so that you can work with a
mono source by plugging into just the L/M input.
To work with RCA phono connections use jack to RCA
converter plugs.
Talkback Input – Dedicated balanced XLR input for
plugging in a microphone to route to the mixes for the
engineer to talk to the performers on stage. Phantom power
can be switched to the socket for condenser microphones.
AES digital out
2Trk out
Alt out
LR main outLamp
Talkback
Mic in
ST1 and ST2
stereo line in
Analogue Mix out 1-10 Mic and Line inputs 1-16
Network
dSNAKE remote audio
USB B streaming
Kensington
Lock
Cable
clamp
Power On/Off
Mains power input
Mains fuse

Qu-16 User Guide 8 AP9031 iss.1b
4.2 Output Connections
Mix Outputs – Balanced XLR line level outputs for the
mono and stereo mixes, for example to feed monitor
amplifiers, fill speaker systems, and external processing
devices. These use low impedance, high quality differential
driver circuits for connection to +4 or 0dBu equipment.
Maximum output is +22dBu.
Professional equipment provides ‘balanced’ connections for
maximum interference rejection over long cable runs. If you
are connecting to ‘unbalanced’ equipment then make sure
the XLR pin 3 (signal cold) is linked to pin 1 (signal ground).
Main LR Output – Balanced XLR line level outputs for
the main Left and Right stereo mix. These typically plug into
the FOH speaker processor, amplifier or powered speakers.
AES Output – 2-channel digital output using a single
XLR connection and standard mic (2-core screened) audio
cable. It follows the AES (Audio Engineering Society) digital
audio standard and can connect to any equipment fitted
with an AES input socket. The source to this output is
patched using the Setup / Audio / Output Patch screen.
Applications include the feed to a PA speaker processor,
amplifier, stereo broadcast or recording device equipped
with AES input.
Alt Out – Stereo ‘alternative’ output on balanced TRS
jacks for connection to +4 or 0dBu equipment such as zone
feeds, fill speakers, broadcast or local monitor. The source
to this output is patched using the Setup / Audio / Output
Patch screen.
2TRK Out – Stereo output on balanced TRS jacks for
connection to +4 or 0dBu equipment such as stereo
recorders. It follows the post master fader main LR mix.
4.3 Other Connections
Lamp – Plug in a 4-pin gooseneck lamp to illuminate the
mixer surface. We recommend the Allen & Heath LEDLamp
with built-in thumbwheel dimmer.
USB B – Type B USB socket for multi-channel bi-
directional audio streaming between the mixer and a
computer. Follows the high speed USB 2.0 standard.
Firmware V1.0 supports connection to an Apple MAC only.
Windows PC drivers are currently not available.
Network – Fast Ethernet (100 Mbit/s) port for CAT5 cable
connection to a computer for MIDI over TCP/IP control of
mixer parameters, or to a wireless router (access point) for
live mixing control using the Allen & Heath Qu-Pad app
running on an iPad. The Lnk indicator flashes to indicate
network activity.
The Qu-Pad app is not supported by firmware V1.0.
dSNAKE – The proprietary Allen & Heath ‘digital snake’
connection for remote audio using the AR2412 AudioRack,
and personal monitoring using the ME system.
dSNAKE is not supported by firmware V1.0.

Qu-16 User Guide 9 AP9031 iss.1b
4.4 Powering up the mixer
The Qu has a built-in universal voltage power supply unit.
This means you can use your mixer in most parts of the
world without the need to modify the unit as long the local
mains supply is within:
Mains Voltage = 100 to 240 V.AC
Mains Frequency = 47 to 63Hz
Important - Before starting, read the Safety Instructions
Sheet packed with the mixer. These can also be
downloaded from the Allen & Heath web site.
Also read the safety notes printed on the rear of the mixer.
AC MAINS IN – Standard IEC socket for connecting the
mixer to the local mains supply. Plug in a mains lead with
moulded plug suitable for your territory. A suitable mains
lead is shipped with the mixer.
Note – Do not replace the mains plug or modify the lead in
any way. For your own safety and that of the operator and
performers do not remove or defeat the ground connection.
A cable clamp is provided. You can slot the cable into this
or lock it in place. To lock the cable use a star head Torx
T20 screwdriver to refit the clamp around the cable.
Fuse – Mains input fuse to protect the mixer circuits in the
unlikely event of a failure or excessive power surge. If you
need to replace the fuse always use one of the same type
and rating as printed on the rear panel. If the replacement
fuse blows then refer to your authorised Allen & Heath
service agent for advice.
Power ON/OFF switch – Press to switch the mixer
on. Press again to switch it off.
Switching the mixer on – Press the ON/OFF switch.
The rear panel blue Power indicator lights. The mixer takes
just a few seconds to boot up. It restores its previous
settings. CH1 is selected and its processing shown on the
screen.
Note – To avoid loud thumps do not switch the mixer on or
off while the PA speakers are turned on. Always switch the
amplifiers on last, and switch them off first.
Switching the mixer off – First select the Home
screen. Touch Shut Down to safely complete processes
such as parameter storing and USB data transfer or
recording. Once complete, press the ON/OFF switch.

Qu-16 User Guide 10 AP9031 iss.1b
5. Operational Overview
This section provides an overview of the Qu-16 layout and operation to help you get started quickly.
5.1 Fader Strips
The Qu-16 has a group of 16 fader strips. These provide access to
the input and master channel levels and processing.
The main channel levels, master levels and all sends to the effects
and mixes can be easily viewed and adjusted using the faders.
The faders can also be used to adjust the Graphic EQ while in
Fader Flip mode.
The faders are motorised and instantly move to show the current
settings when the layer or function is changed.
Layers – There are two Layers. These provide access to 32 strips identified by the labels alongside the
layer select keys.
Press the lower key to access the 16 mono channels.
Press the upper key to access the 3 stereo channels, FX returns, FX send and Mix masters.
Press both keys together to access the user assignable Custom layer (Not supported by V1.0).
TouchChannel Screen select
SuperStrip
Fader Strips
Touch Screen
Master Strip
Mix assign
SoftKeys
Layer select
Copy/Paste/reset
Mix select Mix key
Channel select Sel key
Engineer’s tools
Qu-Drive
Function key

Qu-16 User Guide 11 AP9031 iss.1b
Mute key – Press to turn off the channel audio signal. This affects the send to
all mixes including LR, effects and stage monitors. The Mute key lights red when
the channel is muted. It flashes when it is muted by a Mute Group master.
Sel key – Press to access the Channel Processing. Parameters can be
adjusted using the SuperStrip controls. The Touch Screen will display the settings
and provide additional controls if either the Processing or Routing screen is
active.
The Sel key is also used to:
Assign mix routing – Hold down the Assign key and press Sel keys to
assign channels to the mix currently selected in the Master Strip. The Sel
keys light green for channels assigned to the selected mix.
Assign Pre/Post fade sends – Hold down the Pre-Fade key and press Sel
keys to toggle channel sends pre or post fader for the mix currently selected
in the Master Strip. The Sel keys light green for channels set pre-fade.
Copy channel processing – Hold down the Copy key and press a channel
Sel key to copy its processing settings. Then hold down the Paste key and
press one or more Sel keys to instantly paste those settings to other
channels.
Reset channel processing – Hold down the Reset key and press a channel
Sel key to instantly reset all its processing to factory default.
PAFL key – Press to listen to a channel using headphones and check its level
on the main meters. The meter PAFL indicator lights. Press PAFL again to turn it
off. A SoftKey can be assigned to Clear All active PAFL selections.
Options are available in the Setup screen to choose how you want PAFL to work:
Auto-cancel – Listen to one channel at a time.
Additive mode – Listen to more than one channel at a time.
PFL (pre-fade listen) – Monitor the signal before the fader, for example to
check it and set its gain before you bring up the fader. This is the default.
AFL (after-fade listen) – Monitor the signal in stereo after the fader and pan
controls so that you can hear its contribution and position in the LR mix.
Sel follow PAFL – Link the Sel switch so that pressing PAFL automatically
selects the processing for that channel.
LR to PAFL – Routes the main LR mix to the monitor when there is no PAFL
selected.
Channel meter – The strip meters let you keep an eye on signal levels while
you are mixing. These display channel level before the fader and mute control:
Pk – Lights red to warn that the signal is too hot and gain or trim should be
reduced. It turns on 3dB before clipping to warn you before audible
distortion. Pk senses the signal at several points within the channel.
0– Lights when the signal reaches nominal 0dBu allowing a healthy 18dB
headroom. This is the normal level for mixing.
Sig – Lights to show signal presence. It turns on at -26dBu.
Fader – Controls the level of the input channel, FX or mix master assigned to it.
This can be the main channel fader or a send to an effect or mix depending on
which Mix Select key is active in the Master Strip.
The faders can control the Graphic EQ frequency bands while in GEQ Flip mode
with a mix master Sel key active. The range of frequencies accessed by the faders
is highlighted in the touch screen and labelled at the top of the faders. The centre
0dB flat position is marked on the fader scale.

Qu-16 User Guide 12 AP9031 iss.1b
5.2 Channel Processing
The SuperStrip provides familiar, analogue feel, one function per knob control of channel and mix
master processing such as equalisers and dynamics. The Touch Screen displays the parameter values
and provides additional related controls while in the Processing screen. This processing is accessed
using the fader strip Sel keys.
The following processing is available:
Mono input CH1-16 = Source, Preamp, HPF, Gate, PEQ, Compressor, Delay, stereo Linking
Stereo input ST1-3 = Source, Trim, HPF, Gate, PEQ, Compressor, Delay
FX Return 1-4 = FX parameters, PEQ
Mono Mix1-4 = Graphic EQ, Compressor, Delay
Stereo Mix5-10 = Parametric EQ, Compressor, Delay
Main LR = Graphic EQ, Compressor, Delay
5.3 Working with the Processing:
Press a fader strip Sel key. The Processing Block
controls become active for that channel.
Press the Processing key to work with the parameters
on the Touch Screen.
Touch the top part of the Touch Screen to open the
tabs for the available processing blocks.
View values in the lower part of the screen. Touch
screen buttons and use the screen rotary to adjust
parameter values.
Preamp
An analogue preamplifier (‘head amp’) matches each
connected microphone or line signal to the operating
level of the console before it gets converted to digital
to be processed and mixed with the other channels.
Turn on 48V if the connected device requires phantom
power, for example a condenser microphone or active
DI box. Touch and hold for 1 second to toggle on or
off. This prevents accidental operation.
Note - To prevent audible thumps make sure the
channel is muted before switching 48V on or off.
Turn up Gain so that the average loud signal reads
into the yellow of the meter. Turn down if any red peak
light flashes.
Touch Øto reverse the polarity of the input signal, for
example the lower mic when working with two
microphones on a snare drum.

Peak

Qu-16 User Guide 13 AP9031 iss.1b
Other functions in the Preamp section
Insert switches an internal FX in or out if one has been
patched into the channel. The button is disabled when
the insert is not patched. The FX is inserted between
the preamp and EQ.
Use the FX / Back panel screen to choose and assign
one of the 4 internal FX as an Insert into a channel.
Delay up to 85ms can be added to each input
channel. In most cases delay is not needed, but can
be useful in time aligning sound from the PA to the
acoustic sound from an instrument on stage. Allow
1ms per foot distance as a starting point.
Linking lets you gang the preamp, processing and
routing of an odd/even mono channel pair for stereo
operation. All parameters including the preamp,
processing and routing are linked. Pan becomes a
width control when linked. Some parameters can be
removed from the link using the buttons:
Preamp – Gain/48V, Polarity
Dynamics (Compressor and Gate) - Side Chains
Main mix – Fader/Mute, Pan
Touch Apply to accept your changes.
The USB Source key in the Preamp control block
selects the input source to the channel - either the
analogue Mic/Line input or the USB digital source. Use
the Home / USB Audio screen to set a range of
channels and choose the Qu-Drive or USB B
streaming as the global digital source.
For digital sources (USB) and stereo ST1-3 line inputs
Gain is replaced with a Trim control providing +/-24dB
range. The red knob in the screen changes to blue for
digital sources.
Gate
The Noise Gate can be switched in to dynamically turn
off the audio when it drops below a certain level. For
example, to reduce resonant decay of a kick drum or
floor tom, or hiss of a noisy keyboard.
Use the In key to switch the Gate in or out. This is
similar to inserting an outboard rack mounted device
into the Insert socket on an analogue console channel.
Set Depth for how much signal reduction you want
when the gate closes. 20dB is a typical setting. Sound
check the instrument and reduce Threshold to shut off
as much of the tail of the signal as you want. The GR
indicator lights and red screen meter shows the
amount of reduction when the gate is closed.
Hold sets how long the gate remains open after
dropping below the threshold. Attack sets how fast the
gate opens when the signal rises above the threshold.
Release sets how fast it closes when dropping below
the threshold. Experiment with these controls to
achieve smooth operation without a pumping effect.
Gate active
HPF GATE PEQ COMP DELAY
0
Gain/Trim Insert
Post-Preamp Pre-EQ Post-EQ Post-All

Qu-16 User Guide 14 AP9031 iss.1b
HPF
The High Pass Filter is used to reduce unwanted low
frequency sounds such as vocal popping, wind noise
and stage rumble.
Switch the HPF in using the In key. Use the panel
rotary or screen button and rotary to sweep the cut-off
frequency until you have reduced the unwanted
sound. The filter has a 12dB slope and can be swept
from 20Hz to 2kHz. The violet screen curve shows the
resulting frequency response.
PEQ (parametric equaliser)
The Parametric Equaliser allows tonal adjustment of
the channel sound. It splits the 20Hz to 20kHz audio
frequency range into 4 bands:
LF (low frequency)
LM (low mid frequency)
HM (high mid frequency)
HF (high frequency)
Each provides 3 parameters that can be adjusted:
Gain – Boost or cut frequencies by up to 15dB. Centre
0dB is flat response (no affect).
Frequency – Each band can sweep its centre point
frequency across the full range from 20Hz to 20kHz.
This means you can overlap bands and have more
precise control over problem frequency areas.
Width – Each band has a bell-shaped response. The
width of the bell can be varied from a very wide 1.5
octaves affecting many frequencies to a very narrow
1/9th octave affecting a small range of frequencies.
Setting LF or HF to widest position changes its
response to shelving.
Experiment with the controls to hear their affect on
different sounds. Switch the PEQ in or out using the In
key to compare the sound. It is better to cut rather than
boost frequencies where possible.
Compressor
The Compressor is a powerful tool for controlling the
dynamics of the sound, for example to smooth out a
bass guitar or to narrow the dynamic range of a vocal
to make it more intelligible in a busy mix. At its extreme
setting the compressor can be used as a limiter to
prevent the signal exceeding a preset maximum level.
A compressor works by dynamically reducing the
amount of gain when the signal increases above a
certain threshold. This pulls back loud moments.
Applying ‘make-up’ gain restores the average volume
and also has the effect of bringing up quiet moments.
The result is a reduced dynamic range.
While listening to the signal adjust Thres (threshold) to
set the point at which compression starts. The GR
indicator and red screen meter will start to show that
compression is active. Set Ratio for how much
compression you want from none (1:1) to full limiting
(Inf). A good starting point is around 3:1.
Use the In key to switch the compressor in and out
and turn up Gain so that the average volume is similar.
Compressor active

Qu-16 User Guide 15 AP9031 iss.1b
Attack sets how fast the compressor starts to work
when the threshold is reached. Release sets how fast
it stops compressing when the signal drops below the
threshold. For example, adjust these to achieve a
‘punchy’ dynamic sound, or smooth out the response
to reduce an audible ‘pumping’ effect.
Two ‘knee’ settings are available. Hard Knee means
that compression is applied at the set ratio as soon as
the threshold is reached. Soft Knee means that the
compression ratio increases gradually from 1:1 to the
set ratio as it approaches the threshold. The curve
illustrates this.
4 Compressor types are available using the drop-
down menu. Two ‘Manual’ types allow user control of
attack and release. Two ‘Auto’ types provide automatic
control of the compressor dynamics.
Experiment with the effect of the compressor settings
on different sounds. Try to use compression only
where it is needed, and avoid compression in stage
monitor speakers.
Mix processing
The mix masters provide EQ, Compressor, FX Insert
capability and output Delay.
Insert switches an internal FX in or out if one has been
patched into the mix. The button is disabled when the
insert is not patched. The FX is inserted at the start of
the processing before the EQ.
Use the FX / Back panel screen to choose and assign
one of the 4 internal FX as an Insert into a mix.
Delay up to 170ms can be added to each mix output.
This is typically used to time align the PA to the
acoustic sound from the instruments on stage, or to
align fill loudspeakers to the main PA. Allow 1ms per
foot distance as a starting point.
GEQ (graphic equaliser)
A GEQ is provided on each of the 4 mono mixes and
the main LR mix as these are likely to feed stage
monitors and PA speakers where traditional graphic
equalisation is popular. A PEQ is provided on each of
the 3 stereo mixes where more precise parametric
equalisation may be preferred for in-ear and other
sends.
The Graphic Equaliser allows tonal adjustment of the
overall mix sound. It splits the 20Hz to 20kHz audio
frequency range into 28 standard 1/3 octave bands
from 31.5Hz to 16kHz allowing +/-12dB cut or boost.
Touch the In button to switch the GEQ in or out. Touch
a slider to highlight it and use the screen rotary to cut
or boost its frequency. This affects a small range of
frequencies 1/3 octave wide centred on the frequency
marked below the slider. The position of the sliders
shows the approximate shape of the resulting
frequency response curve.

Qu-16 User Guide 16 AP9031 iss.1b
Press the GEQ Fader Flip key to view and adjust the
GEQ on the faders while a mono or the LR mix is
selected. The screen highlights the active range of
frequencies. Press the switch again to change range
or return to normal mix mode.
The fader strip Sel key turns on when the slider is at
0dB mid (flat) position while in fader flip mode. Press a
Sel key to return a slider to 0dB.
It is better to cut rather than boost frequencies when
tuning speakers using the GEQ.
5.4 Channel Routing
The Touch Screen presents tabs to access the channel assignments and send levels when its fader strip
Sel key is selected and the Touch Screen Routing screen is active. The Channel Block Pan control
provides quick access to the related mix pan setting for the channel. The Fn key is used to access the
Mute Group masters while in any Routing screen.
5.5 Working with the Routing screens:
Press a fader strip Sel key.
Press the Touch Screen Routing key.
Touch the tabs at the top of the screen.
Touch screen buttons and use the rotary.
Press the Fn key to access the Mute Groups.
Pan
The rotary Pan control becomes active when an input
channel Sel key is active. Its function depends on
currently selected Master Strip mix:
LR = Channel main pan
FX send = Channel main pan
Mono Mix1-4 = Disabled
Stereo Mix5-10 = Channel send pan
Pan becomes a Width control when linked for two
input channels – Panning one to the left automatically
pans the other by the same amount to the right.

Qu-16 User Guide 17 AP9031 iss.1b
Channel Routing screen
Adjust the channel Direct Output Trim from off to
+10dB gain. The Direct Outputs can be patched to
feed the internal FX devices, for example a delay effect
send for a single vocal.
The channel source for the Direct Outputs is displayed
on this screen. This is a global setting affecting all
direct outputs. It can be changed using the Setup /
Audio / Global screen.
Channel Mix Sends screen
Use this screen to work with the sends and
assignments from one channel to all the mixes.
Each send can be set Pre or Post fader. It is typical to
set monitor sends pre-fade so that the channel fader
does not affect the monitor mixes, and to set effects
and fill speaker sends post-fade so that their levels do
follow the faders.
The channel can be assigned (routed) On or Off to
each mix. Touch the Level and Pan buttons and use
the screen rotary to adjust their settings.
To work with the sends and assignments from all
channels to one mix use the Master Strip Mix keys and
the fader strips.
Channel FX Sends screen
Use this screen to work with the sends and
assignments from one channel to FX1 and FX2. These
are for Mix>Return effects such as reverb and delay.
The sends can be set Pre or Post fader but it is usual
to leave these set post-fade so that the effects follow
the channel fader level. Each send can be assigned
On or Off. Its Level can be adjusted here.
To work with the sends and assignments from all
channels to one FX mix use the Master Strip Mix keys
and the fader strips.
FX3 and FX4 do not have dedicated sends. However,
you can assign any of the Mix1-10 buses to feed these
effects. To do this use the FX / Back panel screen.
Mix Routing
Select a mix master Sel key while the Routing screen
is active to:
Adjust the Output Balance between L and R of a
stereo mix.
Choose the global Channel Source for the selected
mix. This is the point in the channel signal path that
feeds the mix.
Choose Pre-EQ for a monitor mix if
you do not want the channel EQ to
affect the monitor.
Choose Post-EQ if you want the EQ
but not the compressor to affect the
monitor.
Choose Post-All for effects sends.
HPF GATE PEQ COMP DELAY
0
Gain/Trim Insert
Post-Preamp Pre-EQ Post-EQ Post-All

Qu-16 User Guide 18 AP9031 iss.1b
5.6 Mute Groups
The Qu features 4 Mute Groups. You can assign channels to a Mute Group so that pressing its master
key will instantly mute all assigned channels. For example, mute all drum channels, mute all mics on
stage during band changeover, or mute all FX returns between songs. Mute masters are accessed from
the Home or any Routing screen, or using the SoftKeys.
The following may be assigned to Mute Groups:
Mono and stereo Input Channels
FX Send masters
FX Return channels
Assigning a single channel
Press an input channel or FX send or return fader strip
Sel key and select the Touch Screen Routing screen.
Open the Mute Grp Assign tab. Use this screen to
assign the channel to any combination of the 4 Mute
Groups.
A green tick next to the button indicates that the Mute
Group master is available on the related SoftKey.
Assigning all channels
While in any Routing screen press the Fn key to open
the Mute Groups view.
Select the tab for the Mute Group you wish to assign.
All sources to that group are shown. Touch buttons to
toggle assignments on or off. Touch the Clear/Set All
button to turn off or on all the assignments.
Press the Fn key again to close the Mute Groups view.
5.7 Using the Mute Groups
There are 3 ways to use the Mute Groups:
Touch the master buttons on the Home screen.
While in any Routing screen press the Fn key to
open the Mute Groups view. Select the MG
Masters tab and touch the master buttons.
Assign and use one or more SoftKeys as Mute
Group masters. The Mute Groups are assigned to
SoftKeys with the same number as the group.
The Mute key will flash red if the channel is muted by a
Mute Group. A short flash shows it is muted by the
group only. A long flash shows it is muted by the Mute
key and a group.

Qu-16 User Guide 19 AP9031 iss.1b
5.8 The Master Strip
Qu provides a dedicated fader strip for the Mix Masters. It presents the fader and controls for the mix
currently selected using the Mix keys alongside. The sends to the selected mix are presented on the 16
faders. They move to show the current settings. This provides a very quick way to access each mix
without the need to switch to the Masters layer.
Mute key – Press to turn off the mix master audio signal. The Mute
key lights red when the audio is muted.
Sel key – Press to access the Mix Processing. Its PEQ and
Compressor parameters can be adjusted using the SuperStrip controls.
The Touch Screen will display their controls and settings and provide
access to the GEQ and routing options if either the Processing or
Routing screen is active.
The Sel key can also be used to:
Copy mix processing – Hold down the Copy key and press the
Sel key to copy the processing settings. Then select a different
Mix, hold down the Paste key and press the Sel key to instantly
paste those settings to that mix.
Reset mix processing – Hold down the Reset key and press the
Sel key to instantly reset all its processing to factory default.
PAFL key – Press to listen to a mix using headphones and check its
level on the main meters. The meter PAFL indicator lights. Press PAFL
again to turn it off. A SoftKey can be assigned to Clear All active PAFL
selections. Options are available in the Setup screen to choose how
you want PAFL to work. The default setting is AFL (after-fade listen).
Mix meter – The strip meter lets you keep an eye on the mix master
signal level. This is ‘post-fader’ and displays the level after the fader and
mute control to follow the signal available at the output of the mixer.
Pk – Lights red to warn that the signal is too hot and mix level
should be reduced. It turns on 3dB before clipping to warn you
before audible distortion.
0– Lights when the signal reaches nominal 0dBu allowing a
healthy 18dB headroom. This is the normal level for mixing.
Sig – Lights to show signal presence. It turns on at -26dBu.
Fader – Controls the level of the mix master currently selected. There
is +10dB boost available. Normal setting is around the ‘0’ position.
Mix Select keys – These select which mix master is presented on
the master strip. Only one can be active at any time. Press a key to
select it. Press it again turn return to the main LR mix.
LR sets the strip to control the main LR mix. This is the normal
selection for mixing the FOH (main PA) sound.
FX1-2 sets the strip to control the FX1 or FX2 internal effects send
master. The channel faders move to become the sends to the
selected FX. Channels can be assigned using the Sel keys.
Mix1-10 sets the strip to control one of the mono or stereo mix
masters. The channel faders move to become the sends to the
selected mix. Channels can be set pre or post-fader and assigned
using the Sel keys.

Qu-16 User Guide 20 AP9031 iss.1b
5.9 Working with the sends on faders:
Press a Mix key. The master strip presents the mix fader and
controls. The 16 channel faders move to present the sends to
that mix.
Move a channel fader to adjust its send level to the selected
mix.
Hold the Assign key to view the current channel assignments
to the mix. The Sel keys light when the channel is assigned
(routed) to the mix. To toggle the assignments on or off,
press channel Sel keys while holding Assign.
Hold the Pre Fade key to view the current channel pre/post
fade settings for the mix. The Sel keys light when set to Pre-
fade. To toggle pre or post, press the channel Sel keys while
holding Pre Fade. It is typical to use Pre-fade for monitor
sends and Post-fade for effects sends.
Press the Mix key again or press LR to return to the main
mix, or press another Mix key to adjust a different mix.
Note Always remember to return to the main LR mix once you
have finished adjusting monitor or effects levels.
5.10 Copy, Paste, Reset keys
Press + hold down one of these keys and then press
another key or screen item to copy, paste or reset the
related parameters. For example:
Copy – Press Copy + a channel Sel key to select its
processing to copy. Press Paste + another channel
Sel key to paste the processing to that channel.
You can copy just one processing block such as PEQ
using its In key and then paste it into other channels
using their strip Sel keys.
Reset – Press Reset + a channel Sel to instantly reset
its processing to factory default settings.
The following Copy/Reset is supported:
+ Input strip Sel key = HPF, Gate, PEQ, Comp, Delay
+ Mix strip Sel key = PEQ, GEQ, Comp, Delay
+ HPF In key = HPF only
+ PEQ In key = PEQ only
+ Gate In key = Gate only
+ Comp In key = Compressor only
+ touch Scene item in list = Scene contents
Sends on faders
Pre/Post
Assign
Copy parameters
Paste parameters
Reset parameters