https://bugs.freedesktop.org/show_bug.cgi?id=53068
Bug #: 53068
Summary: alternate sample rate doesn't work for simultaneous
playback/capture on SoC I2S
Classification: Unclassified
Product: PulseAudio
Version: unspecified
Platform: Other
OS/Version: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: alsa
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
CC: [email protected]
Date: Fri, 27 Jul 2012 21:49:22 +0200 (CEST)
From: Peter Meerwald <[email protected]>
To: Pierre-Louis Bossart <[email protected]>
Cc: [email protected]
Subject: Re: [pulseaudio-discuss] alternate sample rate
Hello Pierre-Louis,
> > the command I test is a loopback (just playback or capture works fine):
> > pacat -r -d alsa_input.platform-soc-audio.analog-stereo | pacat -p -d
> > alsa_output.platform-soc-audio.analog-stereo
> It could be that your hardware does not let you reconfigure the input and
> output independently? I am afraid I didn't think about this case when I wrote
> the patches, but if you have a synchronous 4-pin I2S on our SOC without
> sample-rate conversion support the frequency needs to be updated for capture
> and playback, not one after the other. Can you provide more details on your
> hardware?
hardware is the internal audio codec on a beagleboard-xm; so yes, 4-pin
I2S
your statement that the capture and playback sampling rate should be
changed simultaneously makes a lot of sense I think :)
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