From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Multi-channel playback
Date: Wed, 13 Apr 2016 08:51:28 +0200
Message-ID: <570DEC70.6040004@ladisch.de>
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To: "Li, Steve" <Steve.Li@imaginecommunications.com>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
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Li, Steve wrote:
> I am trying to playback a multi-channel PCM stream, e.g. 5.1. Is there an API for configuring the channel positions?

Yes, but not many devices support it.

> calling snd_pcm_get_chmap() return NULL.

Your device (driver), whatever it is, doesn't support reading it either.


Regards,
Clemens