Befaco AC/DC User manual

AC/DC
USER MANUAL

AC/DC FUNCTION INDEX
POWER AND INTRODUCTION
USER MANUAL
AUDIO SETUP
MISCELLANEA
Page 5
Page 11
CONTROLS AND CONNECTIONSPage 4
Page 3

.3
AC/DC POWER & INTRO
POWERING THE
MODULE
THANKS FOR PURCHASING A MODULE FROM BEFACO!
BEFORE YOU PLUG THIS MODULE IN...
USER MANUAL
WHAT IS AC/DC?INTRODUCTION
AC/DC is a class-compliant DC coupled audio interface in Eurorack format. With its 6
HP it is perfect for live performance and travel Rigs. Based on Rebel Technology OWL
platform, it allows sending and receiving both CV and Audio at 16 bits 48 KHz. as
well as load patches from Rebel’s library. It is compatible with all popular DAW and
CV generators either on MacOs and iOS.
1. Disconnect your cabinet from the mains.
2. Triple check the power cord polarity. The coloured line on the cable
(pin number one) is the -12V rail.
3. If you plug the module backwards you might burn it out and
unfortunately this is not covered by the warranty.
4. Modules back can get really hot. Avoid leaving your nger on it
and remember: If it smells like chicken, you are holding it wrong!
5. If you have any questions about this product feel free
to contact us [e-mail]

.4
AC/DC USER MANUAL CONTROLS
1. Audio/CV inputs
These inputs handle both Audio and CV signals within a range of
+/-10V (20Vp-p). The signals present at these inputs will be sent
through the USB port to your device on its related channel.
2. Potentiometers
Audio gain/attenuation pots for each Input. Signal attenuation goes
from -inf dB at counter clockwise position to 0dB at center. From
center to fully clockwise position a maximum gain of +12dB is
applied to the input signal.
3. Input LED Indicators
These indicators works as typical Vu-Meters to show the strength of
the input signal. Red LED indicate when the signal is about to clip.
4. Audio/CV outputs
Signals sent from our device via the USB port are output on each of
its related channels. Output voltage range: +/-10V (20Vp-p).
5. Output LED Indicator
Each output channel has a green level indicator LED. This will show
the signal strength.
6. USB type B connector
This is the main communication port between AC/DC and our device.
Signal data ows in both directions through it.
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.5
MacOS XAUDIO SETUP
AC/DC is a USB audio class-compliant device. This means that you can connect it to your Mac (running Mac OS
10.14 or higher) with a USB cable and use it without installing any software drivers. The computer recognizes
AC/DC as an USB audio device and makes its inputs and outputs available to your host audio software.
In this scenario, AC/DC provides basic signal input and output operation, and no software driver installation
is necessary. Using the Mac’s Audio MIDI Setup utility we can manage AC/DC inputs and outputs. Let’s take a
look to it.
Connect both ends of the supplied USB cable either to AC/DC and a free USB port of your computer. We strongly
recommend to connect AC/DC directly to the computer and avoid devices as USB Hubs to ensure the proper
operation and communication between the OS and the hardware.
Go to System Preferences / Sound and selects OWL-ACDC as either Input and Output audio device.
AC/DC USER MANUAL AUDIO SETUP

.6
MacOS XAUDIO SETUP
Now go to Finder / Applications / Utilities / Audio MIDI Setup and select OWL-ACDC from the Audio Devices list.
Here, you can manage the level of each Input and Output independently.
At this point, you should be able to stream audio from your computer through AC/DC. By default, Outputs 1
and 2 works as the main stereo output of the system.
DAW SETUP (Bitwig Studio)
AC/DC is fully compatible with most popular DAW and Host Audio Software. If you don’t have one already, don’t
worry, we are including an 8-Track license of Bitwig Studio with every AC/DC.
Before start setting it up, check the yer included in the box to download and activate your license.
After open Bitwig Studio you will be prompted with a starting window. Once there, select Settings / Audio. The
menu should look like this:
AC/DC USER MANUAL AUDIO SETUP

.7
MacOS XAUDIO SETUP
Now, be sure that CoreAudio is selected as Driver and pick OWL-ACDC as either Input and Output Device. The
menu now should look like this:
By default, only Inputs and Outputs 1 and 2 are active as either In and Out Stereo pairs. You can active the rest
of AC/DC ports on “Input/Output busses” section by pressing “Add Mono” and “Add Stereo” controls.
You are ready to go, close this window and have fun! For further information about Bitwig Studio visit:
www.bitwig.com
AC/DC USER MANUAL AUDIO SETUP

.8
IOSAUDIO SETUP
Audio-class compliant operation allows you to connect AC/DC to any iOS device with a standard camera
connection kit adapter providing multi-channel audio I/O to your audio apps. To set it up, we need to do it
through the audio apps directly.
Unlike we saw before on desktop DAWs, host audio devices on iOS active all the ports of an interface by default
so we just need to check that all the Inputs and Outputs are recognized properly by the app. In this case, we
will use AUM by Kymatica (link a la app en la apple store), but the process is quite similar and straight forward
on any other audio app. Let’s go for it:
Connect both ends of the supplied USB cable either to AC/DC and your iOS device through the Camera Connection
Kit.
Open AUM and check the Vu-Meter at the top edge. You should see the label “USB 1+2 OUT” over it.
AC/DC USER MANUAL AUDIO SETUP

.9
IOSAUDIO SETUP
Tap over the Vu-Meter to open the drop down menu “Meter Sources” and go to Hardware Input.
Here you should see all the Input ports of AC/DC listed as either Stereo and Mono busses with the name
OWL-ACDC. Go back and now tap on Hardware Output to check the Outputs. This is the fastest way to check if
all the ports of AC/DC are active and ready to use on AUM.
Now tap the three lines at the top right corner to open the main Menu and select Settings. Here you should see
OWL-ACDC as either Output and Input Route at Mic & Speaker section. You can now go back and start using
your interface. Try creating some audio tracks to either send and receive audio from the dierent AC/DC ports
as shown in the following picture:
*For other DAWs, the setup process is the same.
AC/DC USER MANUAL AUDIO SETUP

.10
WINDOWSAUDIO SETUP
Unlike MacOS X or iOS, Windows doesn’t count with a native low latency audio driver on its core. This makes
the use of dedicated low latency drivers mandatory. Unfortunately Rebel technology does not provide yet a
dedicated Windows driver.
The best way to use AC/DC under Windows is with the help of third party drivers like ASIO4ALL.
ASIO4ALL is a hardware independent low latency ASIO driver for WDM audio devices created by Michael Tippach
www.asio4all.org
Please be aware that as this is a third party software, nor Befaco or Rebel technology oer support
over any problem related with the use of AC/DC with ASIO4ALL. Anyway we encourage you to visit
Rebel tech community site for further info!
AC/DC USER MANUAL AUDIO SETUP

.11
MISCELLANEA SPECS AND CREDITS
AC/DC USER MANUAL SPECS
This module is another collaboration with one of the brightest minds in
eurorack: Martin Klang, the man behind Rebel technology.
Befaco Rebel is the battle name we choose to bring you kick ass modules.
We could not be more thankful for this oportunity!
Hardware design, documentation, user interface, and sound design by
Befaco team.
Sample Rate: 48Khz
Resolution: 16 Bits
Latency: 20ms
(Buer size = 256 Samples)
Size: 6HP
Depth: 40 mm
+12v: 200mA
-12v: 30mA