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Re: The Great Pulseaudio Mixer Debate: a modest (productive) proposal



On Wed, 2009-04-29 at 21:12 +0800, Basil Mohamed Gohar wrote:
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> 
> On 04/29/2009 08:21 AM, Callum Lerwick wrote:
> > On Mon, 2009-04-27 at 13:59 -0400, Ben Boeckel wrote:
> >>> Subject: Re: The Great Pulseaudio Mixer Debate: a 
> >> modest (productive) 
> >>> proposal
> >>> From: Ben Boeckel <MathStuf gmail com>
> >>> To: fedora-devel-list redhat com
> >>> Date: 04/27/2009 10:12 AM
> >>>
> >>>> I've had X lock up or temporarily freeze and 
> >> kaffeine 
> >>>> (playing through PA via xine) still plays. The only 
> >> way 
> >>>> I've been able to get it to skip is to force 
> >> basically 
> >>>> everything into swap with programs that take up 3+GB 
> >> of 
> >>>> RAM (making markov chains from big.txt takes...quite 
> >> a 
> >>>> bit in duck-typed languages). Maybe it's the dual 
> >> core 
> >>>> 3.0GHz, but I've found it hard to skip apps using 
> >> PA. 
> >>>> PA is taking 0% CPU and kaffeine jumps to 1% playing 
> >>>> flac files. Also, PA hasn't even jumped towards the 
> >> top 
> >>>> of usage at all in the past few minutes.
> >>>
> >>> That's amazing, because I have a 3ghz dual core and 
> >> PA takes ~10% CPU to 
> >>> play FLAC from Rhythmbox and can skip if I'm doing a 
> >> lot of work - say 
> >>> ffmpeg transcoding and moving files. Intel HD audio 
> >> (yes, generic) 
> >>> Analog Devices chip.
> >>>
> >> Maybe its a difference between xine and gstreamer?
> >>
> >> % lspci | grep -i audio
> >> 00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 
> >> Family) HD Audio Controller
> > 
> > Check your logs. This is quite possibly the difference between "My
> > hardware does 44.1khz natively" and "My hardware only does 48000khz and
> > playing anything but a DVD requires resampling". Later Intel chipsets
> > all seem to be the latter.
> > 
> Not sure if this is the right place to post this, but I also have a huge
> CPU hit on my 4+ year old laptop, and I am sure that it handles
> different sampling rates without much difficulty.
> 
> So, my question is, what logs can I check to find out if this is
> happening (if I understood the message correctly)?

Hrm, pulseaudio's logging seems to have changed. You can try running
"pulseaudio -k;pulseaudio -v" then dig through the spew:

I: alsa-util.c: Device hw:M5455,0 doesn't support 44100 Hz, changed to
48000 Hz.
I: alsa-sink.c: Successfully opened device hw:M5455,0.

If you see something like that, your hardware requires resampling.

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