How do I select the USB Audio input on the EXA100? October 09, 2024 08:00 Updated You can select the USB Audio input by selecting the 'USB' button either via the EXA100 front panel or remote control. Related articles How do I use the Control Bus connection on the EXA100? What DAC does the EXA100 use? EXA100 Manual The EXA100 Speaker A/B light is flashing blue, what does this mean? What is the EXA100 Power Amp Mode?