Not sure if I ever had 928 installed but didn't have any audio issues. While attempting to update Moonlight to 6.2 the link installed 929 which confused me a bit when it said to remove the USB but hadn't actually updated Moonlight.... I had to fully power it off before it would do it. Anyway, 929 installed, Moonlight 6.2 installed. No audio issues with connecting to a Steam host the normal way. I've had some glitchy audio with Moonlight to Sunshine host for a while and that did seem worse but changing the bitrate in Moonlight back to the default of 20mb, instead of the 30mb I had it set on fixed that. It's connected via Ethernet so not sure why 30mb causes issues but the picture seems the same at 20mb so not worried about it.

Edit: Probably should mention im running Steam Beta 12th october update on the host PC.

Isnt valves streaming algo supposed to be as good as moonlight now anyway?

No idea, can't say I could ever tell the difference. It's only 1080p and I sit a decent distance from the TV. I just use moonlight+sunshine so I can use Playnite.