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JRiver Linux 21 problems - cpu usage laggy audio multiple distros

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anton-sa:
oh yeah. previously alsa was selected. but pulse was still running....

im thinking perhaps the newer kernel does better with the newer broadwell platform...

oh and i was able to import all my albums and artwork WHILE listening to multi channel without it skipping a beat.

Awesome Donkey:
I wouldn't attempt using PulseAudio actually - I've read reports the output is stuck at 48kHz so it might be possible the high CPU usage is from it trying to convert the multi-channel DSD to PCM on-the-fly. ALSA is bit-perfect, so honestly there's probably no reason to change this.


--- Quote from: anton-sa on August 27, 2015, 10:01:24 am ---oh yeah,. fedora 22 ships with linux 4.x kernel. ? perhaps this has something to do with it..
--- End quote ---

Possible, from what I've read newer kernels/ALSA are supposed to have better support for DSD.

mwillems:

--- Quote from: Awesome Donkey on August 27, 2015, 10:26:39 am ---Possible, from what I've read newer kernels/ALSA are supposed to have better support for DSD.

--- End quote ---

That's probably part of the story.  I think prior to 3.19 Linux had no native DSD playback ability, so conversion was mandatory prior to that kernel.  Regardless, good news.

bob:

--- Quote from: mwillems on August 27, 2015, 11:32:38 am ---That's probably part of the story.  I think prior to 3.19 Linux had no native DSD playback ability, so conversion was mandatory prior to that kernel.  Regardless, good news.

--- End quote ---
IIRC there was supposed to be a separate format setting for DSD (like S32_LE, S16_LE, etc).
We aren't supporting that yet. With the auto setting S32_LE will be tried first.

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