Hello, All!
Sorry for repost; probably, it's a driver problem.
I have 6 channel CMI8738-based card (it works in 6 channel mode under win32; and works before under Linux with ALSA).
=============================================== lspci output: "0000:00:0a.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)" =============================================== my kernel version 2.4.34 alsa version 1.0.15 =============================================== cat /proc/asound/cards 0 [CMI8738 ]: CMI8738 - C-Media CMI8738 C-Media CMI8738 (model 37) at 0xe000, irq 10 =============================================== cat /proc/asound/card0/cmipci
C-Media PCI CMI8738 (model 37) at 0xe000, irq 10
00: 02 00 01 00 04: 10 1c 00 00 08: 03 00 00 01 0c: 00 00 01 00 10: d4 00 00 40 14: 00 00 00 00 18: 00 80 80 08 1c: fa 4c 04 33 20: 10 01 00 00 24: 20 01 ff 00 28: 00 00 00 00 2c: 00 00 00 00 30: ff ff ff ff 34: 00 00 00 00 38: 00 00 00 00 3c: 00 00 00 00 ===============================================
WBR, SeNS