A NOTE has been added to this issue. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2258> ====================================================================== Reported By: Human Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 2258 Category: PCI - intel8x0 Reproducibility: always Severity: major Priority: normal Status: new Distribution: KnoppMyth Kernel Version: 2.6.17-chw-2 ====================================================================== Date Submitted: 07-05-2006 22:12 CEST Last Modified: 07-11-2006 18:38 CEST ====================================================================== Summary: nForce4 + intel8x0 + Dolby Digital 5.1 + S/PDIF = crackle at start of playback Description: Playing stereo audio never causes a crackle. However, playback of 5.1 Dobly Digital content (standalone audio or audio embedded in video) causes a quick but very loud sub-second audio crackle before playback continues, when the previous playback was _not_ also multi-channel content. The problem always happens when the card is being asked to _switch_ to multichannel audio _from_ either stereo or a non-initialized state. The crackle happens on both coaxial and optical S/PDIF connections to the nForce4 (CK804) onboard soundcard. The same receiver has not had a problem with S/PDIF with a different card (Chaintech AV-710 / ice1724). ====================================================================== ---------------------------------------------------------------------- Human - 07-11-06 18:34 ---------------------------------------------------------------------- I just wanted to add that while playing stereo content via the method described above does not produce static, there is silence for the same duration as the static when playing multichannel audio. I only reported this in case it helps narrow down the source of the problem - if there are separate causes, I can submit a separate bug report. ---------------------------------------------------------------------- tiwai - 07-11-06 18:38 ---------------------------------------------------------------------- It's a known problem of SPDIF on nForce chipsets. SPDIF non-audio output doesn't work well because of lack of proper SPDIF status bit setting. Since SPDIF is transmitted directly from the audio chip, the changing register in AC97 codec doesn't help. Unfortuantely, we have no datasheet to fix this... Issue History Date Modified Username Field Change ====================================================================== 07-05-06 22:12 Human New Issue 07-05-06 22:12 Human File Added: asound.conf 07-05-06 22:12 Human Distribution => KnoppMyth 07-05-06 22:12 Human Kernel Version => 2.6.17-chw-2 07-05-06 22:13 Human Issue Monitored: Human 07-11-06 18:34 Human Note Added: 0010977 07-11-06 18:38 tiwai Note Added: 0010978 ====================================================================== ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
