[vfio-users] crackling sound on i440fx-3.1+ and conversion attempts to q35

[Patrick O'Callaghan]

On Sat, 2020-03-21 at 12:10 +0100, Jiri Novak wrote:
> after some time, iv;e decided to try again gpu passthrough. i tried to
> resue my old vm, which was done on i440fx-2.1, but had issue with
> crackling audio, apart from that, it works fine. as upgrade to 3.0 break
> windows license, i;ve decided to do it anew on q35, but more on that
> later. i;ve went back to some experineting with the i440fx and with
> recent qemu, 4.2, kernel 5.4 (debian bullseye), i have clear audio on
> i440fx-3.0, but it breaks again on 3.1. same on 4.2 any ideas?

You might take a look at:

https://juho.tykkala.fi/Pulseaudio-and-latency#positive-effect-on-latency 

which has some suggestions regarding buffering and latency. I haven't
got round to trying any of this yet, but I intend to at some point.

poc