If you need to utilize backing tracks on stage and if you want to ensure you'll not have any audio issues or dropouts, the SW8-USB from Radial Engineering is the audio device for you. This is an eight-channel switcher and USB interface for use with live concerts.
The SW8-USB has two USB ports to accommodate two different computers. You can synchronize your backing tracks from a primary machine with redundant backing tracks from a secondary machine. If anything goes awry, the device can automatically switch from one computer to the other. Switching can also be accomplished manually from the front panel of the unit or with a separately available footswitch.
The SW8-USB provides multiple analog outputs over eight XLR jacks, eight 1/4" connectors, and 1 DB25 connector. Use these to feed the house and monitor mixes. The 1/4" jacks and DB25 connector are routed in parallel to feed multiple destinations.
The digital path of the SWB-USB can run up to 24-bit and 192 kHz. It comes with redundant auto-switching power supplies to help ensure you never have a dropout.
Connect to 2 Computers over USB
Redundant Power Supplies
Multiple Analog Outputs
The front-panel XLR outputs feature DI box transformers that provide isolation to eliminate hum and buzz from ground loops when connecting to distant PA systems. Individual ground-lift switches are also provided on each channel to further eliminate noise. These outputs can carry line-level or mic-level signal.
The rear-panel outputs operate at line level and are designed to be connected to local monitoring systems to allow the backup-track operator to both test outputs and cue up tracks. These outputs will always be active, so you can use the front-panel MUTE switch to cut the XLR outputs to the PA system during testing while still hearing signal from the rear-panel outputs. The DB25 follows the Tascam pin-out standard, while the 1/4” outputs should be used with balanced TRS connectors.