Date: Fri, 28 Aug 2009 20:37:55 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-multimedia@FreeBSD.org Subject: Re: forcing two channel output Message-ID: <4A9815F3.9010601@FreeBSD.org> In-Reply-To: <4A980B19.4090801@icyb.net.ua> References: <4A980B19.4090801@icyb.net.ua>
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Andriy Gapon wrote: > Please see verbose dmesg here: > http://people.freebsd.org/~avg/ga-ma780g-ud3h/verbose.dmesg.txt > > I get 4 pcm devices and I understand their functions as following: > 0. digital hdmi > 1. analog rear > 2. analog front > 3. digital > > It seems that when I use dsp1 sound goes to 4 jacks at the rear. Indeed. Your Codec is configured for 7.1 output, but snd_hda at this moment does not support more then two channels. So for historical reason it duplicates stereo output to every channel pair. I am going to look at this again after 8.0 release. > But I have only a simple stereo system connected to only one output. > > Should I do anything? You can, if you want/need it. > Can I tell sound driver and hardware to not bother and route sound to only one output? > Should I simply disable the unused jacks (with as=0) or maybe split them off to > separate pcms that I won't use? You can do whatever you like: disable them with as=0 or turn into many separate devices with as=15, or even turn them into many additional inputs. -- Alexander Motin
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