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 [1] http://www.mail-archive.com/alsa-user@xxxxxxxxxxxxxxxxxxxxx/msg17399.html ------------------------------------------------------------------------- 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
