I just read the manual for your ART USB Dual Pre, it says:
Connect your analog jacks and external power supply first. If you are using one of the analog outputs for local low latency monitoring, connect that to your monitor system or headphones. Next, set the front panel controls for proper operation as per the previous sections. Then connect the USB cable to the appropriate input on your computer and lastly to the USB connector on the USB Dual Pre
Once the USB connection is made and your computer
is on, the USB interface circuitry will be powered by your computer over the USB bus and the unit will automatically connect and try to set your computer “Default Audio Device” to be “USB Audio CODEC”. Usually the computer will do this auto-
matically whenever a USB device is first connected, but it is sometimes necessary to make the selection manually. The same settings may need to be made in your particular audio application as well (Check your application instructions). These settings should be made while the two units are connected and powered on. Select one of the following sound recording (input) settings:
Settings => Control Panel => Multimedia
Choose the preferred device: “USB Audio Device”
Settings => Control Panel => Sounds and Audio Devices => Audio.
Choose the mixer device: “USB Audio CODEC”
Programs =>Accessories =>Entertainment =>Volume Control=> Options=> Properties
Choose the mixer device: “USB Audio CODEC”.
Settings => Control Panel => Sound => Playback Tab and Record Tab.
Choose: “USB Audio CODEC”
Latency, the time delay between your audio input and the USB output to your computer, is very short (under 2 milliseconds) in the USB Dual Pre. The latency of your recording software and computer software drivers can be much more than this. Typi
cally on a Mac the core audio interface has low latency so this is usually not an issue. USB audio drivers that come with Windows can have enough latency to cause a discrete delay when monitoring live. If this becomes an issue there are low latency
ASIO drivers available that can greatly reduce your Windows audio latency. Two current resources for low latency ASIO drivers that will work with the USB Dual Pre are: www.asio4all.com