Re: [Qemu-devel] [PATCH 00/12] Audio backend cleanup

[Gerd Hoffmann <kraxel@redhat.com>]

  Hi,

> Yes, I use sdl audio with sdl ui, sdl1 version (since
> sdl2 had its shortcomings in qemu, not all functionality
> worked).

Does it work equally well with the gtk ui?

Possibly it makes sense to use keep sdl audio and default to it only in
case sdl ui is active (simliar to how spice audio is handled).

> I also tried alsa, oss and pa, with these audio was more
> distorted than with sdl.  Sdl version sounds cleanly, while
> alsa and pa, at least in the past, and at least if memory
> serves me right, sounded like a if a good portion of noize
> has been mixed in with sound, or like when sound is with
> quick monmentary drops which happens at high frequency
> (maybe 200Hz).

Buffer overruns and underruns maybe?  Possibly this is simply due to
different default values for sound buffer sizes.

> SDL audio has been the default in Debian for at least two
> debian releases because of that, we explicitly used
> --audio-drv-list=sdl,... to list sdl first.  Now we have
> pa first, but I don't really remember why we changed it.

Useful data point.  sdl state can't be that bad if it was default in
debian until recently ...

cheers,
  Gerd