From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: opengl 'leaking' sound to input.
Date: Thu, 30 Oct 2014 11:30:11 +0100
Message-ID: <54521333.2060105@ladisch.de>
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To: dE <de.techno@gmail.com>, Alsa-devel@alsa-project.org
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dE wrote:
> I'm trying to record audio from the analog input device of my card,
> but whenever there seems to be some graphics intensive activity like
> glxgears, OpenGL assisted window manager, audacity graphs etc...
> a noise appears in the recording which sounds like some kind of
> sparking disturbance.

Sudden changes in power consumption will affect the voltage on the
power lines.  (If the GPU is powered only from the mainboard, there is
not much your PSU could do against this.)  Your card (whatever it is)
apparently is not properly isolated against such fluctuations.


Regards,
Clemens