From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0000818]: Web browsing in Mozilla causes ADAT clocks on HDSP 9652 to be invalid Date: Tue, 1 Feb 2005 21:46:46 +0100 Message-ID: <1fa438ea590ee9e460db0a5030323541@bugtrack.alsa-project.org> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Received: from bugtrack.alsa-project.org (gate.perex.cz [82.113.61.162]) by alsa.alsa-project.org (ALSA's E-mail Delivery System) with ESMTP id 49BA81E7 for ; Tue, 1 Feb 2005 21:46:47 +0100 (MET) 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: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org A NOTE has been added to this issue. ====================================================================== ====================================================================== Reported By: Mark Knecht Assigned To: charbonnel ====================================================================== Project: ALSA - driver Issue ID: 818 Category: PCI - RME HDSP Reproducibility: always Severity: major Priority: normal Status: assigned Distribution: FC2 Kernel Version: 2.6.8.1-1.520.2vS7.ll.rhfc2.ccrma ====================================================================== Date Submitted: 01-14-2005 18:35 CET Last Modified: 02-01-2005 21:46 CET ====================================================================== Summary: Web browsing in Mozilla causes ADAT clocks on HDSP 9652 to be invalid Description: In my setup I's using 3 computers: 1) PanetCCRMA with HDSP 9652 as the center of an audio hub 2) Win XP GigaStudio with Hammerfall Light - two ADAT outputs streaming to HDSP 9652 (ADAT input for clock) 3) Win XP Pro Tools Digi 002 Rack receiving GigaStudio audio from PC https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2 So the signal flow looks like: XP Linux XP GSt ====> HDSP 9652 ====> Pro Tools <=== (ADAT Clock) The HDSP 9652 is the master clock for the network. Both XP machine sync to the HDSP 9652. When no specific audio apps are running on the Linux box then this configuration will work for hours if not days with no problems. All audio data from GSt flows through the HDSP 9652's hardware and the hardware mixer sends it on to the Pro Tools box. It works perfectly. When Mozilla is started and I switch from page to page, after a few minutes I will receive a message on the Pro Tools box that the clock supplied by the HDSP 9652 was invalid. I can browse the same web pages on either XP box and I do not corrupt the clocks. ====================================================================== ---------------------------------------------------------------------- charbonnel - 02-01-05 21:35 ---------------------------------------------------------------------- Hi Mark, >>From what I understand, the card is not in use from the alsa point of view, you just use the matrix routing. Then it may happen when mozilla encounters a page using flash that wants to output audio, if it's setup to do so through the hdsp, that it sets a different audio clock (e.g 44100 vs. 48000). This is normal, and happens also under windows from what I read on the RME forums. The anwser from the support team is invariably 'disable system sounds' or 'don't use the hdsp as the system default audio device'. Thomas ---------------------------------------------------------------------- Mark Knecht - 02-01-05 21:46 ---------------------------------------------------------------------- Hi Thomas, Interesting. Best I can tell these days (since I reported this a couple of weeks ago) is that not all web sites cause Mozilla to do whatever it does. Many, even most, cause me no problems with the current revision of Alsa from PlanetCCRMA. We had some conversations about this on LAU or Alsa-devel - I don't remember which. Seemed that folks there thought it was possible to extend Alsa one fo these days to be able to lock down the card's sample rate instead of letting any app change it. That would be fine with me. I don't care about OSS audio quality. I just want hdspconf to be in total control so that I set the card's sample rate and it doesn't change, but maybe that's for some future date. Currently I do not use Mozilla when doing important audio stuff but that forces me to do web browsing on a Windows box instead. Anyway, thanks for looking into this and thinking about future improvements. Cheers, Mark Issue History Date Modified Username Field Change ====================================================================== 01-14-05 18:35 Mark Knecht New Issue 01-14-05 18:35 Mark Knecht Distribution => FC2 01-14-05 18:35 Mark Knecht Kernel Version => 2.6.8.1-1.520.2vS7.ll.rhfc2.ccrma 02-01-05 21:35 charbonnel Note Added: 0003466 02-01-05 21:46 Mark Knecht Note Added: 0003470 ====================================================================== ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl