[alsa-devel] sbxfi - What works/doesn't summary

Takashi Iwai tiwai at suse.de
Tue Oct 28 20:02:57 CET 2008

At Tue, 28 Oct 2008 17:40:40 +0000,
Jason Harvey wrote:
> The Source wrote:
> > You can't hear desktop sounds because they always use pulseaudio no 
> > matter what sound system you select as default. For me pulseaudio 
> > plays first sound fine after start, others are corrupt along with 
> > sound from all other apps. I'll post hw_params later. Also pulseaudio 
> > tends to crash often with this driver so I suppose your problem is the 
> > same.
> Can confirm that once pulse (on FC9 at least) gets involved it sounds 
> terrible.
> I worked out that I had removed a package pulseaudio-esound-compat at 
> some point in the past and never realised that it contains the symlinks 
> that gets Gnome to start the pulse server.
> Once that was fixed the desktop effects started working but only out of 
> my USB headset... and nothing I can find in the gui lets me do anything 
> about it.

In many cases, the pulse problem comes from the in accurate DMA position
calculation.  PA is often too aggressively updating buffers.

> mplayer and firefox/flash sound terrible, very tinny and scratchy.
> This is with the base_rate=48000 option set in modprobe.conf

Do you mean a regression with 48kHz in comparison with 96kHz?


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