ART Pro Audio USB Mix - Project Series - Manual (Page 4)

4
INSTALLATION
1) Connect your audio device cables to the XLR or 1/4" TS CH1 INPUT or 1/4" TRS CH2-CH3
INPUT connectors. If you're using the CH1 INPUT with a 1/4" TS plug, next select the INST-Hi-Z
or LINE setting.
2) Connect the USB Mix USB TO COMPUTER connection on the back panel to the appropriate USB
input on your computer, using the supplied USB cable. You can also connect cables between the
MAIN MIX OUTPUT 1/4" TRS jacks and an analog audio input such as an amplifier.
3) Connect a pair of headphones to the MONITOR OUTPUT 1/4" TRS jacks if you want to monitor
the signal locally.
4) USB BUS POWER: No external power connection is needed. Power is supplied over the USB
connection. The front panel POWER LED will indicate that USB power is present when the USB
cable is connected to a live USB jack or to the included AC power adapter. If connecting to a
computer USB input, it is best to connect directly to the computer or, if using a USB hub, make
sure it is a powered hub, to ensure ample power for the USB Mix.
MONITORING WHAT YOU RECORD
The USB PLAYBACK TO CH2-CH3 pushbutton switch, when pushed in, provides a mix of the
preamp and computer signals. During typical operation either a local audio source is playing back, or
the computer is playing back, but not both at the same time. You can listen to either the preamp, or
the computer, without changing any settings. You will also be able to hear any computer alert signals
while you are listening to the record or tape if the alerts are also routed to the USB CODEC in your
computer’s sound setting control panel.
Some recording programs and computer systems provide what is called a “Play-Through” function.
This can be performed through software or hardware. When play-through is enabled, the computer
will output the audio that is being recorded, at the same time that it is actually being recorded. There
is a short delay, or latency, with this audio signal. There is also a potential for the computer’s audio
inputs and outputs to be inadvertently connected together thereby forming a feedback loop. This can
accidentally create very loud and disturbing sounds. Therefore, play-through is usually disabled by
default in both software and hardware.
If software/hardware play-through is enabled and the USB PLAYBACK TO CH2-CH3 pushbutton
switch is pushed in, then you will probably hear the original signal together with the computer audio
signal slightly delayed, thereby creating an echo effect. This is normal behavior, so while using the
USB PLAYBACK TO CH2-CH3 function, it may be preferable to leave play-through disabled.