On Mon, September 25, 2006 13:55, Dominique Dumont wrote: > > Hello > > I have some problem using the SPDIF output of my SB Live card while > performing I/O on my SATA drive. (See [1] for the whole story on the > ALSA mailing list) > > My Yamaha amplifier does not recognize the AC3 (Dolby digital) stream > from the sdpif plug while performing I/O on my SATA drive. > > If I have a lot of I/O (e.g. running md5sum on a 4Gb file), the AC3 > stream is completely broken. > > If I have some I/O (e.g. reading a Hi-def movie), I get some AC3 > drop-out even if the CPU is about 50%. > > I have the same result with DTS output. > > With PCM output, I've noticed a hi-frequency distortion, which means > that the interaction between SATA and snd module occurs several > thousands time per second. > > My set up is: > - Debian Linux kernel 2.6.17 > - Sound blaster SB Live 5.1 (snd_emu10k1 module) > - SATA drive (sata_sil and libata module) > - A7n8x deluxe mobo > - AMD XP 3200 > > So far I verified that: > - AC3 output works fine when SATA drive is left alone > - AC3 output works fine when running md5sum on a PATA drive > - DTS output works fine on the mobo SPDIF output (snd_intel8x0 module) > even when running md5sum on the SATA drive. (cannot try AC3 stream > because of Soundstorm chip :-( ) > - Preemp kernel option does not fix the problem > - when running md5sum on SATA drive, alsa driver report a starvation > (xrun) every few seconds, not thousands of time per second. > > Could someone shed some light on this problem ? > > What can I do to help debug this problem ? > > Thanks > > Have you tried using a different slot for the SB Live? -- Francesco Peeters ---- GPG Key = AA69 E7C6 1D8A F148 160C D5C4 9943 6E38 D5E3 7704 If your program doesn't recognize my signature, please visit http://www.CAcert.org/index.php?id=3 to retrieve the Root CA certificate. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
