Fiio R7 Manual page 19

6. How to enable the USB DAC function?
For Mac computers, it is driver-free.
For Windows computers, please make the settings as the followed steps.
1.Install the FiiO DAC driver in the computer first.
2.Switch the working mode of the R7 to USB DAC mode on the drop-down
menu or go to Settings->Mode choose menu to enter the USB DAC mode.
3. Connect the R7 to the computer by the USB port. Select the R7 as the audio
input both in the computer and the music app, so it can work.
Notes:
1. When in the USB DAC mode, the R7 does not support Bluetooth