[LAU] ALSA and RME Raydat troubleshooting

[Vaclav Mach]

I've tried to change period size from 256 to 4096 (2^n values) and there
was no difference.
The only difference was during changing of master sample rate where I
could hear different "position" of interruptions while setting 32kHz or
48 kHz.
Note that buffer size is fixed at 16384 samples (note is from the driver
source code) and I also proved it during experiments.

Vaclav

On 10/21/2014 02:02 PM, Florian Paul Schmidt wrote:
> On 21.10.2014 13:20, Vaclav Mach wrote:
>
> > pcm.out_dmix { type dmix ipc_key 56874 ipc_key_add_uid false
> > ipc_perm 0666 slave { pcm "hw:2,0" period_size 2048 channels 36
> > rate 48000 } bindings { 0 0 # from 0 => to 0 1 1 # from 1 => to 1
> > } }
>
>
> Just a shot in the dark (it has been a looooong time since I last
> played with this stuff):
>
> Is the period size maybe too large? Does the hardware actually support
> 2048 frames? Maybe try 1024 frames. Also maybe try setting the
> buffer_size attribute to something that makes sense with the channel
> count and period size. Maybe 2^16 = 65536 Or even bigger? Would have
> to read documentation on the exact semantics. I leave that to you
> though ;)
>
> Good luck,
> Flo
>
> P.S.: There's also a channel #alsa on irc.freenode.org. Knowledgable
> people hang around there, too
>
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
>


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