From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benny Sjostrand Subject: Re: How to put 16bit none audio PCM data stream into a 32bit none audio S/P-DIF transport stream? Date: Tue, 08 Apr 2003 23:39:31 +0200 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <3E934193.6090605@cucumelo.org> References: <20030408140230.GA1987@ulima.unil.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: Takashi Iwai Cc: Paul Davis , Gregoire Favre , alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org > > >i'm afraid that it's not so easy as it sounds. it strongly depends >on the hardware driver implementation... > >about AC3, 32bit spdif is likely irrelevant. A52 (AC3) is usally >packed into normal 16bit frames. > >does the click happen even if you use alsa-tool's ac3dec? > > Exaclty what do you mean with 32bit spdif ? Sorry, I feel a little bit newbie about the SPDIF protocol specific details. From the cs46xx driver point of view, 48khz 16bit audio or AC3 (non-audio) is the same thing, 16bit left, 16bit right. I think the cs46xx HW supports 20 bits resolution, but that's not implemented in the DSP firmware, therefor not supported by the driver (only 16bit stereo). /Benny ------------------------------------------------------- This SF.net email is sponsored by: ValueWeb: Dedicated Hosting for just $79/mo with 500 GB of bandwidth! No other company gives more support or power for your dedicated server http://click.atdmt.com/AFF/go/sdnxxaff00300020aff/direct/01/