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Date: Wed, 13 Mar 2013 00:26:59 +0100
From: Patrick Lamaiziere <patfbsd@davenulle.org>
To: Pierre Emeriaud <petrus.lt@gmail.com>
Subject: Re: ATI IXP400 issue : very low output
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Le Sat, 9 Mar 2013 15:04:15 +0100,
Pierre Emeriaud <petrus.lt@gmail.com> a écrit :

Hello,

> I have a sound issue with my recently-installed FreeBSD. The
> motherboard has a ATI IXP400 with an ALC655 chip.
> 
> At first I thought that output wasn't working. But increasing the
> volume on the amplifier I was using resulted in a *very* weak sound
> output, which sounds like a leakage current being amplified. Whereas
> I'm using an application (I've been testing with vlc) or directly
> piping random to /dev/dsp0, I get the same output level.

I've seen something similar on a Macbook pro (very very low output). I
must add an "ovref" quirk.

(/boot/loader.conf)
hint.hdaa.0.config="ovref"

(for the record it was:
http://lists.freebsd.org/pipermail/freebsd-multimedia/2009-January/009703.html)

Not sure if this will help. Regards.