From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Peroutka Subject: Re: Revo 5.1 Date: Thu, 08 Dec 2005 21:42:48 +0100 Message-ID: <43989AC8.1020203@seznam.cz> References: <43948A9F.6020009@feens.org> <43948F9E.50407@seznam.cz> <4395A188.7060307@feens.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Takashi Iwai Cc: Trevor Feeney , alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org Takashi Iwai wrote: > At Tue, 06 Dec 2005 09:34:48 -0500, > Trevor Feeney wrote: > >>Was taking a look at the source for the Revo 5.1, noticed a few things. >>You set it up as using only 6 DACs, going by the 5.1 I figure, but when >>you consider that it also has the headpone out, it would have the same >>number of DACs as the 7.1 (8 DACs in all). >> >>Takashi - that answers your question in the last thread...from what I've >>read, the 5.1 only uses one codec, and the headphones would just be a >>separate channel. I tried adjusting the number of DACs to 8 in the >>driver, and did manage to get two >>DAC mixer sliders. I'm not really sure if that was the way to go or >>not. I tried adjusting the asound plugin to output to 8 channels, pcm >>device surround71, but that didn't seem to work. I wondering if it >>needs to be setup separately thant the other 6 channels so that it would >>be considered it's own PCM device. That goes a bit beyond my realm of >>knowledge for driver development though...still trying to learn this. >>Been reading a lot of the documents and such. > > > [Added alsa-devel ML again] > > In the case of ice1724, you can open a stereo stream separately. > The first PCM is assigned to the multi-channel, i.e. 2-8 channels > interleaved format. The secondary PCM is for SPDIF. The third PCM is > the "independent" streams. This may have up to 3 substreams, each of > which is a 2-channel one. If you change num_dacs = 8, you'll be able > to access plughw:0,2,3 (suppose the card# is 0) for the last two > channels individually: > > % aplay -Dplughw:0,1,3 foo.wav > > And you have to raise the corresponding DAC mixer values, of course. > > > Takashi I've enabled all 8-channels of AK4358 in the driver, but I was unable to access the 4-th substream, because (as you noted) there are max 3 substreams per PCM, so "plughw:0,2,3" is actually not available (the other substreams work fine). I'd really like to try the 4-th substream because there is a good chance that it is used to drive the headphone output (I see no other chip on the board for headphone out). Is there any other way to access the 4-th substream of PCM#2? Looking at ice1724.c I see no easy way to do that, so I'm again asking you for help :) Thanks in advance, David ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click