From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: [usb-audio] VIA/Audinst HUD-mx2: One of two PCM
 device is available for playback
Date: Sat, 06 Jul 2013 16:30:34 +0200
Message-ID: <51D82A0A.1010102@ladisch.de>
References: <51D3662A.9010708@sakamocchi.jp> <51D55B01.2090705@ladisch.de>
 <51D7FDA5.3080006@sakamocchi.jp>
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To: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Takashi Sakamoto wrote:
>> This device has multiple alternate settings for PCM and AC-3 playback.
>> The driver creates multiple devices for those because it has no other
>> mechanism to distinguish them.
>
> Can we realize whether the PCM device for AC-3 stream (hw:0,0) works
> or not from the output of lsusb?

If the device declares that it supports AC-3, it'd assume that this will
work (if the data actually is AC-3).

>>    defaults.pcm.card 0
>>    defaults.pcm.device 1
>
> The card ID differs depending on the user's system.

defaults.pcm.card "HUDmx2"


Regards,
Clemens