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From: Jie Jiang <jjinfo@nudt.edu.cn>
To: Randolph Chung <rchung42@gmail.com>
Cc: alsa-devel@alsa-project.org,
	Mark Brown <broonie@opensource.wolfsonmicro.com>,
	s.hauer@pengutronix.de
Subject: Re: Questions about alsa driver for i.Mx27 + wm8974: playback time shorter than the original record time
Date: Wed, 01 Sep 2010 00:57:39 +0800	[thread overview]
Message-ID: <1283273859.10728.22.camel@UT43> (raw)
In-Reply-To: <AANLkTin+mZr75vin9AB0W+zHLXrTtP6UGuAyUSfKpXgE@mail.gmail.com>

Then how about imx-ssi driver's support for mono capture?
Does anybody succeed to do this?

I try to capture an aux input into a mono wav file, what I get in the
wav file is not correct. But when I try to record with "arecord -d 10 -c
2 -f S16_LE -r 8000 -t wav foobar.wav", the wav file is much closer to
the aux input audio, although still not the expected result. Is it the
same possible reason that affects mono channel capture?

Regards,
Jie




On 二, 2010-08-31 at 09:21 -0700, Randolph Chung wrote:
> >
> > Yes, it seems to be this reason that causes problem.
> > When I playback a stereo wav file(8kHz,16bit, stereo), everything goes
> > well.But when trying to playback a mono wav (8kHz,16bit, mono)file,
> > problem stills exist.
> >
> > What's the possible reason for incorrect handling of mono file?
> > How to solve it so I can playback mono file correctly?
> 
> The imx-ssi driver does not support mono-channel playback. I've also
> looked at this a bit but couldn't quite figure it out. Maybe Sasha
> (cc'ed) can give some pointers?
> 
> randolph
> 


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      reply	other threads:[~2010-08-31 16:51 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-26 12:05 Questions about alsa driver for i.Mx27 + wm8974: playback time shorter than the original record time Jie Jiang
2010-08-26 12:41 ` Mark Brown
2010-08-26 14:13   ` Randolph Chung
2010-08-31 16:21   ` Jie Jiang
2010-08-31 16:21     ` Randolph Chung
2010-08-31 16:57       ` Jie Jiang [this message]

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