In your wired music system, all the speakers are wired to an amplifier.
Simply plug your device (computer, laptop, tablet) into this amplifier using a stereo cable.
Use a 3.5mm to 2-Male RCA Audio Cable that you can easily find in any consumer electronic store. The 3.5mm jack plugs into your device (desktop, laptop, tablet). And the 2-male RCA plug into the AUX input of your amplifier.
Set the output of your amplifier to "Auxiliary".
Click "Play" on the Soundsuit App.
You're done! Enjoy the Soundsuit music experience in your venue.