Precision Tools for Audio Professionals
We've put together this page to answer some of the frequently asked questions about using the Audibox USB DI Series.
These answers were
originally done for Windows XP. For
later Windows versions the process remains the same but the
names can change, so click on the appropriate link in the
list at the bottom of this page for the latest updates for
your operating system
Q: "My USB DI works fine during soundcheck, but 'goes to sleep' just before showtime, and needs to be disconnected and then re-connected before it will work. What's wrong?"
A: Luckily this is a power management setting problem, and not the USB-DI's. Here's how to fix it:
This should solve the
'USB DI goes to
sleep' problem". This is a
government mandated power saving move, to prevent excess
energy use, which probably works well for data, but not for
"The output of my USB DI is not loud
A: These two problems have the same cause excessive gain at the mixer needs to be applied to deliver the level required, drastically lowering the signal to noise ratio.
As luck would have it, though, there is a simple solution. The Windows default volume setting for USB Audio Devices is 50% of maximum. For our purposes this will be too low, inducing noise and hum as the gain following the USB-DI is increased
We recommend increasing this volume setting to 100%, on both PCs and Macs. Here's how to fix it in Windows XP (For later versions the process remains the same but the names change so click on the appropriate link at the bottom of this page):
This will give you the optimum signal to noise ratio and allow you to reduce the gain on the mixer.
NOTE: This still needs to be done even if you are using the USB DI-VC model. The volume control on this model only affects the analog outputs, and you'll need to increase the digital volume first.
NOTE 2: This will need to be done
each time you plug the USB-unit in after removing it
Q: "The Input to my USB I/O is too hot and is overloading the computer/hard disk recorder"
A: For this we will have to dig into the operating system again, and this time reduce the Input to the USB I/O.
Q: "After I connect the USB DI I get a hissing and/or clicking noise when I move my USB mouse"
USB is a very popular Plug and
Play protocol for lots of Windows devices. It's quite likely
that you will already have various USB devices in use on
Q: "My onboard soundcard stopped working when I connected my USB DI"
With USB Plug and Play,
you can only use ONE audio device on a computer at
a time. If you plug in another, the previous one will
stop. If you then unplug the second one, the first will be
available, although you may have to re-select it from the
list of Audio Devices. Go to Control Panel/Sounds and
Audio Devices/ and click the list of Sound Playback
and Sound Recording Devices.
Q: "My laptop audio is noisy when I run it from the power supply, but clean when I run it from the battery"
A: Although it may be more convenient to run a laptop from its external power supply, the sad truth is that not all external power supplies are created equal; in fact many of them are just not up to the standard required for any kind of audio.
Some are very good, and quiet, but many come with the surprise addition of a pink noise, digital noise and hum generator built in, a feature which unfortunately cannot be disabled!
Price and brand also have very little bearing on the quality of the laptop power supply! It's a very good idea to carefully check your laptop and power supply combination prior to any kind of audio use, and if in doubt, stay with a fully charged battery.
Another alternative is one of the
aftermarket generic power supplies, as sold by many computer
shops. However, try before you buy is the name of the game!
If you are using a laptop/notebook computer with the Audibox
USB-DI / USB DI-VC
/ USB I/O, we strongly recommend
that where possible you run the computer from its battery -
fully charged, of course!
Q: "I get a buzzing sound when I sit my USB I/O next to my mixer's power supply"
The complete ARX Audibox USB series contain
multiple transformers, double shielded for ultra low noise.
However, they are still transformers, and as such they are
always looking for something electrical to transform! Do not
sit any of your USB devices next to, or on top of a power
supply, power amplifier, or similar AC connected device.
These can spray out Radio Frequency (RF) interference,
digital 'zipper' noise, hum and buzz inducing noise in large
amounts that may force their way into the transformers
inside the USB DIs. Keep them as far away as
necessary to avoid this happening.
Click Here for the ARX USB Knowledge Base
Click Here for Audibox USB App Notes
Click Here for USB Audio Basics
Click Here for Audibox USB DI info for Win 8
Click Here for Audibox USB DI info for Win 7
Click Here for Audibox USB DI info for Win XP
Click Here for Audibox Win98 SE install information
Back to to Audibox Product Listing
Thanks for looking at the range of ARX professional audio products. If you would like to contact us, please click on the Email link above.
Contents © ARX Systems®