From: plessas@mur.at (Peter Plessas)
To: alsa-devel@alsa-project.org
Subject: via82xx DC offset at -30dB
Date: Mon, 29 Oct 2007 01:44:34 +0100 [thread overview]
Message-ID: <20071029004434.GD32311@mur.at> (raw)
Dear List,
having a Compaq Presario notebook in front of me, running Debian testing
and a 2.6.18-4-686 kernel, i have a strange DC offset when trying to
record audio via the mic/line input. As the audacity level meters
suggest, it resides at -30dBFS.
Audio comes through and gets recorded though, but the offset severely
limits the headroom of course.
The sensitivity of the line/mic input seems to be quite high, although i
have the mic boost setting turned off of course.
Setting the module option ac97_quirk=yes did not help either.
Can it be that a soundcard of this strange behavior is manufactured, or
is it an alsa/driver issue? I really don't want to install another M$
operating system to check if it works there, so any help is deeply
appreciated.
lspci lists the device as:
00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686
AC97 Audio Controller (rev 20)
regards, PP
PS: please CC: me, as i am not subscribed to alsa-devel (yet)
next reply other threads:[~2007-10-29 0:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-29 0:44 Peter Plessas [this message]
2007-10-31 8:30 ` via82xx DC offset at -30dB Takashi Iwai
2007-10-31 15:08 ` Peter Plessas
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