From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Demian Martin" Subject: Via VT82xx VT1708 ICE1724HT and higher sample rate/bit depth files through SPDIF Date: Mon, 25 Feb 2008 22:15:17 -0800 Message-ID: <068801c8783e$f5456390$d450a8c0@PDSMain2> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from n6.bullet.mud.yahoo.com (n6.bullet.mud.yahoo.com [216.252.100.57]) by alsa0.perex.cz (Postfix) with SMTP id 630382460F for ; Tue, 26 Feb 2008 07:19:30 +0100 (CET) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org I have several problems trying to play files higher than 48000 KHz and with bit depth of 24 bits. I submitted this to the users and got a resounding silence. = First- sample rate Even though the documents claim that it will play at 176.4 KHz and 192KHz whenever I play a file at these rates it down converts to =BD the rate (882= 00 and 96000). I tested this with the ICE1724HT (Juli@) which has almost the same core, I never could get 176.4KHz at the SPDIF output. I confirmed that the ICE1724 will play the file at 176.4KHz in Windows so its not a hardware limitation. I tried to do the same with the VT1708 (on a Via CX700 chipset) and the Windows driver wouldn=92t let me at anything other than 48000. = = Second, the only way I can get the 24 bit files out in a form that the card can play is to pass them through dmix. But I need to reconfigure dmix for each sample rate. And I=92m not convinced that it isn=92t resampling twice,= both at the input and the output. Or how to configure the buffers etc. to prevent underruns even when the only conversion is to pass a 24 bit file to the card. = I=92m trying to build a high quality music server that will pass the files = to either the internal or an external DAC at the bit depth and sample rate they were recorded at. I have tried to understand the various plugs and settings but it seems they are all focused on mixing various streams. I want to send the files unmixed to the output. I can=92t figure out what set of plugs and settings in asound.conf would enable this. = = =