From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: IEC switch issues
Date: Wed, 23 Jun 2010 14:05:32 +0200
Message-ID: <4C21F88C.6000200@ladisch.de>
References: <AANLkTinpl5hs7NRAm38uF7FbGCOuIOxCvohD70jOQxam@mail.gmail.com>
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To: pl bossart <bossart.nospam@gmail.com>
Cc: alsa-devel@alsa-project.org
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pl bossart wrote:
> If I play my AC3 data on my HDAudio/SPDIF output using the hw:0,1
> device, I can use alsamixer/amixer to mute/unmute.
> 
> Now if I use the iec958: plugin, I can't control the mute switch any longer:

Muting an AC-3 stream would require encoding a stream of silent PCM
samples (no data is not the same as silence); therefore, the iec958
plugin disallows muting.


Regards,
Clemens