[smachiz]

It might be your dock.

Check to see whether it's USB or Thunderbolt. Thunderbolt docks are more expensive, but considerably more efficient and faster than USB (assuming your laptop/device supports Thunderbolt).

Thunderbolt docks are basically PCIe extension devices, whereas USB docks attach everything as USB, with all the common challenges USB has on systems (like dropped audio when the CPU is busy).

[muhammadusman]

Thanks for the info. The dock is the CalDigit TS3 Plus dock and I’m using it with an LG monitor. Their page says it’s a Thunderbolt dock so I wonder if there’s anything else about this particular dock that could be causing this issue. Btw when the monitor was connected over HDMI, it was fine playing audio.

https://www.caldigit.com/ts3-plus/

[MBCook]

That is absolutely TB and was one of the recommended docks in the Mac world for a long time.

Have you talked to support? Or I wonder if it’s an issue on the LG side.

[smachiz]

That's pretty interesting. Might be worth trying a new displayport cable, or checking whether there's a firmware update for either the dock or monitor.

[SV_BubbleTime]

No one would be able to answer this for you in your house with your cables with your speakers. Get another one and test it.