No sound - using an audio interface

[doolhoofd]

Could you please share which version of Windows and which version of FxSound you are running?
Also, since the Volt Audio Interface is connected via USB, I looked up some previous advice given about USB-connected devices:

@bvijay

It is possible that the USB device is powered off during system standby. Can you please check in device manager if [your device] has any power management tab in its property pages and if any option is selected to turn off the device to save power. I have given the USB Root Hub property pages in my system for an example. You can also check the power management settings on the USB root hub and USB controllers on your PC. The settings might affect the USB device connected to the port of that controller.

@Antman

Be advised =

USB devices may stop functioning correctly when multiple devices connected to the same USB hub go into selective suspend - Microsoft Support

@Antman

Here, we are not making the distinction between

1. USB device not recognized
2. FxSound not polling/not reading recognized devices

I would rule out/in a working USB port first. The following assumes a good port.
Does the windows volume mixer see the BT device?
If Yes, enable sound by cycling BT on/off.
If No, report.