Can't adjust volume on MacBook Pro

So in one of my usb-c ports I have a usb-c to usb-a dongle, and in that usb-a port I have a DAC/amp that outputs to 4 pin xlr (my headphones). For some reason, I am unable to adjust the volume on my headphones with both the physical keys and the software menu. In my sound settings it says that the selected device has no output controls. Any way to fix this?

MacBook Pro (2020 and later)

Posted on Mar 17, 2022 9:40 AM

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Posted on Mar 17, 2022 11:01 AM

I suspect that the volume can only be controlled by the gain knob on the Monolith HPA.


Check with Monoprice Customer Service - I assume that's where you purchased the unit. Their support email address is support@monoprice.com

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Can't adjust volume on MacBook Pro

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