From: David Henningsson <david.henningsson@canonical.com>
To: alsa-devel@alsa-project.org
Subject: Re: HDMI with more than 2ch ?
Date: Tue, 25 Jan 2011 02:17:50 +0100 [thread overview]
Message-ID: <4D3E24BE.8030607@canonical.com> (raw)
In-Reply-To: <1295860599.14528.8.camel@skunk>
On 2011-01-24 10:16, Xavier Bestel wrote:
> Hi,
>
> I'm using HDMI output on an HD 2600, using KMS from kernel 2.6.37:
> http://www.alsa-project.org/db/?f=b3f67a0890f9878b7b3f345578e24eda0aaa59ac
> The problem is that only 2ch are supported (not 1, not 3 or more). I
> tested with speaker-test, it only works with -c 2.
>
> So how can I access the other PCM channels ? There are 8 of them
> available in the HDMI standard, I thought the card should be able to
> drive all of them.
According to your HDMI codec it only supports stereo output, not
8-channel PCM. This is a limitation in your hardware, not in the HDMI
standard.
That is, if you want more channels, you probably want to ac3-encode the
audio data.
--
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic
next prev parent reply other threads:[~2011-01-25 1:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-24 9:16 HDMI with more than 2ch ? Xavier Bestel
2011-01-24 9:22 ` Xavier Bestel
2011-01-25 1:17 ` David Henningsson [this message]
2011-01-25 6:47 ` Xavier Bestel
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