Hello, > > -----Original Message----- > > From: oss-devel-boun...@mailman.opensound.com > > [mailto:oss-devel-boun...@mailman.opensound.com] On Behalf Of Dev > > Mazumdar > > Sent: 23 February, 2011 19:32 > > To: Discussion mailing list for developers of OSS > > Subject: Re: [oss-devel] Intel atom SCH support > > > > Hi, > > > > > > I wonder why the OSS HDaudio parser is finding so many controls. I > > suspect that the BIOS may have some kind of bug and that causes so > > many controls. First thing I would recommend is check to see if you > > have a BIOS update - kindly apply that.
To exclude hardware or BIOS problems, I used a different atom based board that we had lying around (other hardware vendor). Both are identical where audio chain is concerned (intel US15W SCH and ALC888 codec) Ossplay, osstest and ossmix have exactly the same behaviour. > > > > SOmething is wrong because the device is showing gray1 and > > gray2 jacks. > > I wonder if it's finding the docking station codec as well as the > > front panel codec. I guess there's also an HDMI codec. > > > > The MIX controls are basically Summing widgets that take the sum of > > all the outputs and inputs as the input. > > > > If the mixer takes also the outputs as input, it can explain why I have a periodic noise on top of my signal. How do I break this loopback ? Where does the mixer output the sum of all signals to ? Straight to the DAC or is the mixer after the DAC? > > This may need some special parsing. Try to compile the > mixgen2.c file > > in utils directory and generate the parsed output (see > > http://opensound.hg.sourceforge.net/hgweb/opensound/opensound/ > > file/44441f68d702/utils/mixgen2.c) > > > > > > I attached the output of the mixgen command to the mail. > > The results are interesting : it mentions spdif in and outs > and I do have 2 physical digital jacks on my board, but there > are no mixcontrols in the general mixer to mute them. This > could be the reason (or part of it .. ) that when osstest > tests the spdif that I hear it on the analog jack ... I tried looking on the OSS4 webpages for pointers on how to customize the parsing, but couldn't find any. Please advise, Sven _______________________________________________ oss-devel mailing list oss-devel@mailman.opensound.com http://mailman.opensound.com/mailman/listinfo/oss-devel
