Nov 18, 2023
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I've had the products for quite a while now.

Products: FiiO USB DAC-E10, DT 990 Pro headset (I think Beyerdynamic).

Sometimes headset audio only comes from the left-side. The right-side silent. I have 'mono audio' switched off. I've tried disabling/enabling the device. I've tried reinstalling drivers. I have the FiiO Control Panel. I've tried the headset with/without the USB DAC.

Sometimes randomly, the right-hand side ear piece works for a short amount of time. The cable doesn't appear damaged, unless it is from my computer chair wheels.

What troubleshooting methods do you suggest?