From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Detecting if a pcm device is a digital or analog
 one
Date: Fri, 25 Jun 2010 10:21:33 +0200
Message-ID: <4C24670D.4010501@ladisch.de>
References: <AANLkTinFnfXXikPmn1vGmt2WHQQnhGAzav9nYOvB4Vda@mail.gmail.com>
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To: Jean-Yves Avenard <jyavenard@gmail.com>
Cc: alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Jean-Yves Avenard wrote:
> I was wondering if there was any way to accurately distinguish between
> audio device, if it has an analog or a digital output.

Not really.  There are devices where the same stream is routed to both
analog and digital outputs, and sometimes the driver cannot know if
there is a DAC further down the line.  In any case, this would be very
hardware specific.

What do you need this for?


Regards,
Clemens