Angry Audio Chameleon C4 User manual

ANGRY AUDIO
PHONE
[phone]
WEB
[e-mail]
www.angryaudio.com
ADDRESS
128 HOLIDAY CT STE 118
Franklin TN 37067 USA
USER GUIDE
P/N 991036
Revision 1.0
Chameleon C4
Livestream Audio Processor

1 Welcome! Safety First 2
Welcome to the world of Angry Audio,
home of Audio Chameleon.
Since the beginning of time, man has sought to control the sounds of his
environment. Cave-dwellers needed to eliminate echo, hunter/gatherers
wanted low-pass lters for mastodons, and early settlers of Peru’s high
mountains had a deep desire for eective peak control (get it?).
Seriously though – engineers from the dawn of broadcasting have sought to
tame the dynamics of their content with ever-improving technology. The rst
analog limiting ampliers gave way to multi-band processing, which in turn
was supplanted by DSP. But getting the basics right and sweating the details –
those things will never be obsolete.
A good studio is built by including components that make it a convenient and
enjoyable place to create the content that dazzles your listeners, drives trac
to your advertisers, and lets you keep the summer place in Jackson Hole.
Accordingly, every Angry Audio product – including this Chameleon audio
processor – is designed to solve common yet critical problems, and is
meticulously engineered with performance and longevity in mind to deliver
pristine audio and reliable performance for many years.
Our promise and guarantee.
Folks who install Angry Audio products generally think they’re the bee’s knees,
and we hope you’ll feel the same. That’s why we give you 30 days to laugh, cry,
and hug it out with your Chameleon audio processor. If you nd you lack the
emotional attachment you were hoping for, we’ll buy it back.
Every Angry Audio product is warrantied to be free from defects in parts and
workmanship for two full years after you purchase it. If it fails within this time
period, Angry Audio, at its discretion, will repair or replace it so long as you
let us know of the failure within the warranty period and can provide proof of
purchase in the form of a dated sales receipt. You can call us at +1 615-763-
3033, or reach us online at www.angryaudio.com/contact.
Making a good rst impression.
When you unbox your Chameleon audio processor, we hope it makes a good
rst impression and you take a moment to appreciate the lengths we’ve gone
to in order to create a “built for broadcast” product. All of our products are
over-engineered to provide long-term reliability and guaranteed RFI immunity.
Some of this is apparent – such as the durable powder-coated steel enclosure
- but much of this goodness is invisible, like the premium components within.
Even if you can’t see it, you’ll hear it!
A word or two about safety.
The fact that you’ve purchased an Angry Audio product proves without doubt
that you’re an intelligent person – not the sort who would intentionally re up
a kerosene heater in the house, or drop a frozen turkey into a vat of boiling
oil. Nevertheless, our legal eagles tell us we must provide some boilerplate in
order to guard against the unexpected.
Audio gadgets aren’t nuclear generating stations or air trac control consoles,
but they are still intended for use by qualied personnel. To avoid electric
shock, do not open the unit or attempt to perform any servicing unless you
are qualied to do so.
Chameleon audio processors have an internal 120VAC / 240VAC power supply.
Hazardous voltages are present whenever the unit is plugged in and may still
be present on certain components even when the unit is unplugged.
The power cord is the primary disconnect device and so the outlet providing
power to the unit should be easily accessible. In other words, make sure you
can pull the plug in case of emergency. Use only a properly grounded outlet
for power. Do not cut the ground pin or use a ground-lifting adapter, and do
not defeat the polarized plug. Do not overload outlets.
Do not expose your Chameleon to rain or moisture. Do not block any
ventilation openings, as lack of airow could damage the unit or create a re
hazard. Any electronic device can fail without warning; do not use this product
in applications where a life threatening condition could result due to failure.
Exercise caution with headphone volume. Permanent hearing damage
may result from excessive volume.
Never operate your Chameleon audio processor while driving; a car is a
dangerous weapon. Do not attempt to feed raccoons by hand unless you
think the nickname “Stumpy” will bu your status within your social circle. And
for heaven’s sake, throw out those powder-blue Sansabelt slacks you got in
1979. You’re never going to get down or boogie-oogie-oogie in those again.

3 Rack Mounng Wall Mounng 4
Mounting your Chameleon in a rack.
Your Chameleon audio processor sits on four rubber feet that ensure it won’t
slide o the edge of your Lucite desk when your yacht heels over too hard.
If you prefer to rack mount your Chameleon, you’ll need the optional Rack
Mount Kit which allows one or two units to be installed side by side in a
standard 1RU rack space.
Each Rack Mount Kit consists of a custom rack panel with cutouts for all front
panel controls and displays. A blank ller panel is also provided if you are
mounting only one unit.
When rack mounting, remove the four rubber feet (“A”) from the bottom of the
gadget with a #1 Phillips screwdriver.
Remove the four front panel 3/32” hex screws (“B”). You can rummage around
your toolbox for your own hex key, or use the one we thoughtfully provide in
the mounting kit.
Line up the Chameleon so that the
holes exposed after removing the
socket head screws line up with the
mounting holes (“C”) in the rack panel.
Attach the rack panel to the front of
your unit with the same screws you
just removed. If you dropped one and
it immediately got lost in the shag
carpet (as these things always do),
don’t panic – we’ve included spares in
the kit.
Finally, use the provided rack screws
(all four, please) to mount your
Chameleon.
Attaching your Chameleon to a wall.
We can’t for the life of us image why you’d want to wall-mount an audio
processor, but hey – you might. And if you prefer to secure your unit to the
inside of a rack, cabinet, or other at surface, the optional Wall Mount kit
comes in handy.
Each Wall Mount Kit includes two brackets, four No. 6 screws, and four cup
washers.
Remove the four rubber feet (“A”) from the bottom of the gadget with a #1
Phillips screwdriver, being careful to save the screws.
Align the bracket holes with
the holes in the bottom of
the gadget, then attach the
brackets using the screws
removed from the rubber feet.
Use the four No. 6 screws
(“B”) and the four cup washers
(“C”) to secure the gadget to
a plywood surface. Drilling
pilot holes is recommended to
reduce the risk of splitting the
wood.
Dierent hardware (not
supplied) will be required if
you are mounting the gadget
to a drywall (or other) surface.
Remove 4 rubber feet (A) from bottom of gadget using #1 phillips screwdriver.
Remove 4 socket head screws (B) from front of gadget using 3/32IN hex key.
Line up gadget so that the holes exposed after removing socket head screws
line up with the mounting holes (C) in the rack panel. Use 4 socket head
screws (B) to secure the gadget to the rack panel.
A
Remove 4 rubber feet (A) from bottom of gadget using #1 phillips screwdriver.
Retain the screws. Align the holes in the wall brackets with the holes in the
gadget bottom. Attach the brackets using the screws removed from the rubber
feet. Use four No.6 screws (B) and four cup washers (C) as shown to secure
gadget to a plywood surface. Different hardware (not supplied) will be needed
if the mounting surface is drywall.
A
A
A
A
B
C

5 Under Counter Mounng Desktop Mounng 6
Mounting your Chameleon under a counter.
Your Chameleon can be mounted under a counter, desk, or table using the
optional Under Counter Mount Kit.
This kit includes two brackets, four No. 6 wood screws, and four cup washers
suitable for mounting to a plywood surface. Dierent hardware (not supplied)
may be needed if the mounting surface is a dierent material.
Remove the four rubber feet (”A”) from the bottom of the unit using a #1
Phillips screwdriver, being careful to save the screws.
Line up the brackets (“C”) so that their
mounting holes line up with holes exposed
after removing the rubber feet. Orient the
brackets as shown in the diagram to the
right so that the deeper at side supports
the gadget and the “notched” side faces the
under-mount surface.
Use the pan-head screws (“B”) removed from
the rubber feet to secure the brackets to the
gadget.
Use the four provided No. 6 screws
(“D”) and the four cup washers (“E”)
as shown in the diagram to the left
to secure the gadget to the plywood
underside of the counter, desk, or
table.
Drilling pilot holes is recommended
to reduce the risk of splitting the
wood.
Using your Chameleon on a desktop.
If you like the idea of using the Chameleon on a desktop but prefer a more
permanent installation along with the convenience of having it angled up
toward the user, we’ve got you covered with the optional Desktop Bracket Kit.
This kit includes two brackets, four No. 6 wood screws, and four cup washers
suitable for mounting to a plywood surface. Dierent hardware (not supplied)
may be needed if the mounting surface is a dierent material.
Remove the four rubber feet (“A”) from the bottom of the unit using a #1
Phillips screwdriver, being careful to save the screws.
With the bottom of the Chameleon
facing up and the front panel facing
toward you, line up bracket “C” with
the holes exposed after removing the
feet on the right side of the gadget.
Orient the bracket as shown in the
diagram to the right so that the at
side is attached to the unit, and the
“notched” side sticks up with the notch
facing outwards. Use the pan-head
screws (“B”) removed from the rubber
feet to secure the brackets to the unit.
Use the four provided No. 6 screws (“E”)
and cup washers (“F”) as shown in the
diagram above to secure the gadget to
a plywood surface.
Drilling pilot holes is recommended to
reduce the risk of splitting the wood.
Remove 4 rubber feet (A) from bottom of gadget using #1 phillips screwdriver.
Line up brackets (C) so their mounting holes line up with the holes
exposed after removing feet. Orient the brackets as shown in the drawing.
Use 4 panhead screws (B) to secure the brackets to the gadget.
Use four No.6 screws (D) and four cup washers (E) as shown to secure gadget to a plywood surface.
Dierent hardware (not supplied) will be needed if the mounting surface is of a dierent material.
B
C
C
A
D
E
Remove 4 rubber feet (A) from bottom of gadget using #1 phillips screwdriver.
Line up brackets (C) so their mounting holes line up with the holes
exposed after removing feet. Orient the brackets as shown in the drawing.
Use 4 panhead screws (B) to secure the brackets to the gadget.
Use four No.6 screws (D) and four cup washers (E) as shown to secure gadget to a plywood surface.
Dierent hardware (not supplied) will be needed if the mounting surface is of a dierent material.
B
C
C
A
D
E
GADGET BOTTOM
GADGET BOTTOM A
Remove 4 rubber feet (A) from bottom of gadget using #1 phillips screwdriver.
Line up brackets (C) and (D) so their mounting holes line up with the holes
exposed after removing feet. Orient the brackets as shown in the drawing.
Use 4 panhead screws (B) to secure the brackets to the gadget.
B
C
D
E
F
Use four No.6 screws (E) and four cup washers (F) as shown to secure gadget to a plywood surface.
Dierent hardware (not supplied) will be needed if the mounting surface is of a dierent material.
GADGET BOTTOM A
Remove 4 rubber feet (A) from bottom of gadget using #1 phillips screwdriver.
Line up brackets (C) and (D) so their mounting holes line up with the holes
exposed after removing feet. Orient the brackets as shown in the drawing.
Use 4 panhead screws (B) to secure the brackets to the gadget.
B
C
D
E
F
Use four No.6 screws (E) and four cup washers (F) as shown to secure gadget to a plywood surface.
Dierent hardware (not supplied) will be needed if the mounting surface is of a dierent material.

7 About Chameleon C4 Controls & Connecons 8
Targeted loudness control for Livestreams.
You’re familiar with the problem: you’re listening to your stream and you
notice that the loudness varies wildly. You’ve tried your best to make sure your
meters stay as close as possible to 0dB, but for some reason you can’t quite
keep the perceived loudness from climbing and diving like a roller coaster at
the county fair.
Broadcasters x this problem with program audio processors that use a
combination of signal modication tools to shape sound and control loudness.
You’ve probably noticed how consistent broadcast audio usually is – all thanks
to these (very expensive) devices lled with displays, meters, spectrographs
and controls with labels like “Drive”, “Overdrive” and “LightSpeed”. You
could spend years learning how to set up these devices – but who’s got the
patience? All you want is consistent sound!
Chameleon C4 gives you exactly what you’re after. It employs an innovative,
intelligent new approach to program audio processing. C4 analyzes the
incoming audio and continually adjusts its parameters to t the content.
Rather than the usual bazillion knobs and buttons, C4 automates all that
complexity. No need for the expert; just hook it up, ip a few switches, and
Chameleon gets right to work.
To get that great “On the Air!” sound, Chameleon uses a form of A.I. (a
benevolent form, not the evil Skynet kind) to continuously adjust its
parameters to t the content of your program audio. Chameleon has a very
open and natural sound which preserves the character of your content
whatever the format: rock, classical, country, pop, talk, commentary or sports.
C4 also features our exclusive precision loudness controller. When engaged,
you can set any loudness target from -24LUFS to -14LUFS and your livestreams
will be compliant with loudness standards from Apple, Youtube, AES
(proposed), Amazon and others.
Easy to use? You bet. There are only 3 controls on the front panel; you’ll be
up and running in just minutes. Set your output loudness target, choose
your level of processing, then sit back and start sending your subscribers to
streaming Nirvana. Ahh...the sweet sound of success.
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AB
Volume control adjusts
output level of both
front-panel headphone
jacks.
Dual-function LUFS/
level calibration control.
Choose your loudness
target; C4 does the rest.
Activity LEDs indicate
processing, gating and
clipping activity.
Density control. Choose from
3 processing density options,
plus bypass.
¼” and 3.5mm
headphone jacks
supported.
Don’t make him angry.
You wouldn’t like him
when he’s angry.
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AB
AES/EBU inputs and
outputs on StudioHub+
connectors.
Stereo analog inputs
provided in both XLR
and StudioHub+ format.
Stereo analog
outputs on XLR
connectors.
Analog pass-through on
StudioHub+ connector
lets you send input signal
to other devices.
Analog output on
StudioHub+ connector
delivers audio + power
to compatible devices.
DIP switches activate
active phase rotation
and select between
digital and analog
inputs.

9 Setup Operaon 10
Select your input source.
Chameleon C4 is equipped with both analog and digital audio inputs and
outputs on XLR and StudioHub+ RJ-45 connectors. A DIP switch on the rear
panel selects which input feed to use.
As shipped from the factory, analog is selected as the default input, but best
performance will be achieved by using the digital input and output (AES/EBU)
on StudioHub+ RJ45 connectors.
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AB
To change the audio source, nd the DIP switches on the rear panel, adjacent
to the line cord. For ANALOG input, leave DIP switch B in the “down” position.
To select DIGITAL input, ip DIP switch B to the “up” position.
Feed other devices.
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AB
The Analog section of the rear panel hosts two items to take note of. The
ANALOG THRU connector is useful for daisy chaining the same input source to
multiple devices. Let your imagination run wild!
The ANALOG OUT StudioHub+ RJ-45 connector provides audio and ±15VDC
to certain types of connected devices. For example, you could use this to feed
both power and processed audio over CAT5 from your Chameleon C4 to one
or more Angry Audio Headphone Gizmos (shameless plug) at guest positions
in your studio as illustrated below.
Processing controls.
Most audio processors are meant for on-air heavy lifting, and have so many
controls, knobs and displays that a PhD in Advanced Tweakage is required.
Chameleon C4, on the other hand, is so easy to use that there’s hardly any
tweaking to do. In fact, there’s only one processing adjustment. Put your
Craftsman Heavy-Duty Titanium Tweak Tool back in the cabinet with the tape
head demagnetizer to keep it from getting lonely.
Choose your desired audio processing mode using the selector switch on the
front panel:
The 6 o’clock position (🛇 symbol) is Bypass mode. This allows you to
compare processed audio with unprocessed audio during setup.
The 9 o’clock position (○ symbol) selects Open processing. This is the
lightest processor setting; it delivers good dynamic range with a light
amount of smoothing.
The 12 o’clock position (◐ symbol) selects Medium processing. This gives a
good amount of audio density, and is probably the setting most users will
prefer.
The 3 o’clock position (● symbol) selects Dense processing mode. It is the
most processed setting, and delivers consistent loudness to the user.
Volume knob at the far right of the front panel controls the volume of the
two (¼” and 3.5mm) headphone jacks. These jacks are mutually exclusive.
Enable/Disable Loudness Controller
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AB
To engage the BS.1770 loudness controller, set DIP switch “A” on the back
panel to the UP position. To disengage, set switch to the DOWN position.
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11 Operaon About LUFS 12
Setting the Loudness Target.
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The Loudness Controller and the Calibration screw to the left of the front-
panel processing selector work together to help you achieve your LUFS target.
When Loudness Control mode is “o” (see Page 12), the Calibration control
functions as an output level trim. In trim mode, C4 sets output level to -10
LUFS. In this setting, processing texture is more “dense”, comparable to
broadcast radio. LUFS can be adjusted by using the Calibration control to
reduce the output level without changing audio processing texture.
When Loudness Control mode is set to “on” (see Page 12), the front-panel
Calibration screw becomes a multifunction control to adjust the LUFS target.
This is a multi-turn screw without end-stops.
When the Calibration control is turned 20 turns (or more) clockwise,
Loudness Target is set to -14 LUFS.
When the Calibration control is turned 20 turns (or more) counter-
clockwise, Loudness Target is set to -24 LUFS. As LUFS target is reduced,
so is audio density texture.
To achieve LUFS settings inside the -14/-24 range, a LUFS meter is
required. We recommend the free Youlean Loudness Meter software.
The Activity Display.
The three LEDs found on the front panel tell you what’s going on inside
Chameleon C4’s processing engine.
The Amber LED at left is the “Gain Lock” indicator. This indicates that
processing is frozen and that gating is active.
The Green LED at center tells you that the processing section is engaged
and audio is actively being processed.
The Red LED at right tells you that your audio is overdriving the C4’s inputs
and that clipping is occurring. Reduce input gain until the LED darkens.
“What is LUFS and why should I care?”
Good question! LUFS, stands for Loudness Units Full Scale. It’s a standardized
way to measure the perceived loudness of audio content. Instead of just
watching for the loudest bits of audio and squeezing them down, LUFS
looks at the overall loudness of your content, providing a more accurate
representation of how loud something sounds to listeners’ ears.
Audio engineers use LUFS to make sure that dierent songs or broadcast
segments sound consistent, and avoids sending listeners scrambling for the
volume button while shouting “AAAAAAAHHHH!”
LUFS works no matter how you’re listening. Whether you’re streaming from
your smartphone speakers, using high-quality headphones or listening in the
car, LUFS control makes sure that the overall loudness will remain relatively
consistent, avoiding random, startling volume changes.
LUFS also helps you, the streaming content originator, comply with your
streaming platform’s loudness requirements.
For more about LUFS, loudness and levels, read Cornelius Gould’s white paper
“Audio Loudness in the Age of Digital Media”, a free download from our site.
LUFS targets for popular streaming sites
Nearly every streaming platform has a loudness standard for the content they
deliver. If you deliver content compliant with that standard, your streams will
sound great. If not, the streaming provider will normalize your content for
you (insert ominous ‘dun-dun-DUHHHH!’ music here). It’s kind of like letting
Grandpa salt your food: the result will NOT be what you wanted.
In short, the streaming platform only cares that its loudness target is met, not
whether your content sounds good. So optimize your stream’s loudness levels
to match the requirements of your service and you’ll be golden.
Here are loudness requirements from several common streaming platforms. If
you use a dierent platform, ask your representative what their LUFS target is.
Spotify: -14 LUFS
Apple Music: -16 LUFS
Amazon Music: -9 to -13 LUFS
Youtube: -13 to -15 LUFS
Deezer: -14 to -16 LUFS
Soundcloud: -8 to -13 LUFS

13 Specicaons. Compliance 14
Specications.
Part Numbers
North America: p/n# 991036
Australia: p/n# 991036A
Europe: p/n# 991036E
United Kingdom: p/n# 991036U
Included in the box: Chameleon C4 Processing Gadget
Pocket trimpot adjustment tool
Connections
Analog Input: Balanced +4dBu Stereo XLRF connectors
Balanced +4dBu Stereo RJ45F connector
(StudioHub+ pinout)
Analog Through: Parallel to Analog Input (StudioHub+)
Analog Output: Balanced +4dBu Stereo XLRM connectors
Balanced +4dBu Stereo RJ45F connector
(StudioHub+ includes ±15VDC)
Digital Input: Transformer isolated, AES/EBU, RJ45F connector
(StudioHub+) ASRC, 44.1kHz to 48kHz sampling rate
Digital Output: Transformer isolated, AES/EBU, 48kHz S/R,
RJ45F connector (StudioHub+)
Power and Environmental
Power Input: 115VAC 50/60Hz (North America Version)
230VAC 50/60Hz (Australia, Europe, U.K Versions
Power Consumption: 15VA
Operating Temp.: 0° to 40° C (32° to 104° F)
Storage Temp.: -20° to 45° C (-4° to 113° F)
Relative Humidity: 0% to 90% non-condensing
Cooling: Venting chassis (fanless)
Product Dimensions
Product Dimensions: 8.5 x 6.25 x 1.7 inches (21.6 x 16 x 4.32 cm)
Product Weight: 3.5 pounds (1.59 kg)
Shipping Weight & Dimensions
Shipping Dimensions: 12 x 9 x 6 inches (30.5 x 22.9 x 15.3 cm)
Shipping Weight: 5 pounds (2.27 kg)
Compliance in the U.S.
In the U.S., this Gadget complies with the limits for a Class A computer device
as specied by FCC Rules, Part 15, Subpart J, which are designed to provide
reasonable protection against such interference when this type of equipment
is operated in a commercial environment.
…and in Canada.
In Canada, this Gadget does not exceed the Class A limits for radio noise
emissions set out in the Radio Interference Regulations of the Canadian
Department of Communications.
…and in Europe.
This Gadget complies with the requirements of the EEC Council Directives
93/68/EEC (CE Marking), 73/23/EEC (safety – low voltage directive), and
89/336/EEC (electromagnetic compatibility). Conformity is declared to
standards EN50081-1 and EN50082-1.
...and in Wonderland.
This Gadget complies with any and all directives set forth by the Red Queen
relating to audio electronic devices, pursuant to the All Ways Are My Ways Act
of 1865. No hedgehogs are harmed by the operation of this device.
Because who would want to harm an innocent hedgehog?

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