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Comment by muhammadusman | Hacker News Reader

This post was informative and I didn't realize just how different DisplayPort is from HDMI. Recently, I got a desktop dock that uses DisplayPort instead of HDMI to connect to my monitor. My monitor has 2 HDMI ports, 1 Type-C, and 1 DisplayPort. So far things have been fine but I did notice that the audio is choppy no matter what I do. I thought it was the dock but audio going from my computer > dock > my webcam's speaker works fine (all over usb-c). So unfortunately, it leads me to believe that the DisplayPort is causing this jittery audio.

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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).

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/

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.

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.

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.

My screen only has HDMI and my desktop only has DP out, so I bought a $2 adapter from Temu. The audio surprisingly works fine, I thought that would be a total oversight.

Picture on the other hand is slightly janky, which seems to be a common issue for DP->HDMI convertors. If anyone knows a convertor that doesn't turd up the signal I'd love to know.

Same here with an lg monitor on dp

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