[alsa-devel] HDMI Multichannel LPCM/RAW Support/Status

Takashi Iwai tiwai at suse.de
Wed Feb 27 17:18:01 CET 2008

At Tue, 26 Feb 2008 21:11:17 -0500,
Dustin Kerstein wrote:
> I was just curious if there is any planned support for multichannel LPCM/Raw
> audio for newer HDMI based chipsets. There are several matx boards with HDMI
> 1.1 and above compliance, which means they should be able to pass 8-channel
> LPCM audio. Also, in HDMI 1.3 and above, Bit Stream passing is supported,
> which actually should be easier, bandwidth wise, than LPCM. Multichannel PCM
> (above 2 channels) was never an issue because SPDIF lacked the bandwidth.
> After talking with some people in irc it seems as though the # of channels
> setting in Alsa is only one bit. Thanks.

Well, I have no plan yet because I have no such a hardware...

I'm willing to help implementation if you can give any pointers for
technical details.


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