From: Clemens Ladisch <clemens@ladisch.de>
To: Dave Zielinski <DZielinski@righthandtech.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Subject: Re: Pops, Clicks on Capture w/ S/PDIF, Cirrus Logic CS4207, HDA
Date: Thu, 12 Aug 2010 08:54:35 +0200 [thread overview]
Message-ID: <4C639AAB.5050606@ladisch.de> (raw)
In-Reply-To: <69FA8BA3444DD443841AF768F2F6C65A12490213C9@SERVER2.righthandtech.local>
Dave Zielinski wrote:
> ...
> So now we're getting some audio but it comes with pops and clicks when
> we try to capture. An analysis of the captured stream shows there are
> corruptions of the data that are 8192 frames apart which I believe are
> the 4096 frame period boundaries (although tough to know for sure).
> When the corruption occurs there seems to be 5 to 7 frames that are
> screwed up. Also worth noting: these same exact samples appear in
> the stream at a prior location so I think its old buffer data.
How far away is that prior location; exactly buffer_size?
If not, this looks like a bug in the CS4207's RX sample rate converter.
Try disabling it by setting bit 6 in the S/PDIF interface control
register (insert "coef |= 0x0040;" in the init_digital function).
Regards,
Clemens
next prev parent reply other threads:[~2010-08-12 6:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-12 0:20 Pops, Clicks on Capture w/ S/PDIF, Cirrus Logic CS4207, HDA Dave Zielinski
2010-08-12 6:54 ` Clemens Ladisch [this message]
2010-08-12 17:42 ` Dave Zielinski
2010-08-13 7:06 ` Clemens Ladisch
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