[pulseaudio-discuss] Some info on the RME Hammerfall DSP
dak at gnu.org
Mon Sep 27 05:07:16 PDT 2010
David Kastrup <dak at gnu.org> writes:
> load-module module-alsa-sink sink_name=dsp_out device=hw:DSP format=s32le channels=18 channel_map=left,right,aux0,aux1,aux2,aux3,aux4,aux5,aux6,aux7,aux8,aux9,aux10,aux11,aux12,aux13,aux14,aux15 tsched=0
> load-module module-alsa-source source_name=dsp_in device=hw:DSP format=s32le channels=18 channel_map=left,right,aux0,aux1,aux2,aux3,aux4,aux5,aux6,aux7,aux8,aux9,aux10,aux11,aux12,aux13,aux14,aux15 tsched=0
> into the default configuration. That works reasonably well, but one
> gets glitches most particularly when playing Flash audio.
> I just now figured out that removing the tsched=0 lines works fine as
> long as you run
> amixer -D hw:DSP cset numid=23 on
> before starting pulseaudio.
> amixer -D hw:DSP cget numid=23
> now displays
> numid=23,iface=CARD,name='Precise Pointer'
> ; type=BOOLEAN,access=rw------,values=1
> : values=on
> where the default is 'off'. Which does not appear to disturb Jack. But
> pulseaudio most certainly does not seem to like it, with tsched=1
> suffering much worse than tsched=0.
> Setting this to 'On' makes pulseaudio work worse with tsched=0, and
> apparently have no problems with tsched=1.
Might likely be added as a PostScriptum to Trac ticket #764.
> Is there any way I can get Pulseaudio to set this particular control
> when opening the hw:DSP device?
That I still want to know.
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