Getting audio glitches with spatial audio

[magnilens]

I have a soundbar connected to my PC via the HDMI port on the GPU. I have to use spatial audio (I have both Dolby Atmos and DTS:X for Home Theater) to get HD audio support. Without them, I only have PCM output, not even MC-PCM. Also, I'm sure this problem is specific to MPV because I can run the same videos in VLC without problem.

With spatial audio on (applies to both of them) whenever a 4k video is played fullscreen on my 4k monitor, the audio stream will eventually produce pops and squeaks. If the video is not played at 4k resolution, such as in a resized window or at 1080p fullscreen on my secondary monitor, the glitches don't happen.

The glitches also can happen when the video has "complicated" subs displayed. In this case, even though the video was 1080P, the glitches started happening when the video was snapped to 4k fullscreen on my main monitor. If it was just windowed or 1080P fullscreen on the secondary monitor, no glitches.

When I first wanted to report this as an issue here, I saw the suggestion to use hardware rendering. I tried that and it seemed to resolve the glitches on unsubbed videos. However, the glitches are still happening on subbed videos even with hardware rendering turned on.

I also tried --no-config, made no difference compared to hardware rendering.

This strikes me as a workload issue. I am hoping someone can suggest options on reallocating additional resources to MPV that may allow it to play such videos without glitches.