GIGABYTE P55A-UD3P ALC889 5.1 channel problem

[sssrs]

My system

1. GIGABYTE P55A-UD3P BIOS=F8
2. Core i5 750 (1156)
3. WESTERN DIGITAL 1.5 TB WD15EARS SATA ll / 64MB Green Power
4. SEAGATE ST31500341AS 1.5 TB SATA ll / 32MB
5. G.SKILL DDR3 4RL/1600 (2GBX2) CL 9-9-9-24
6. GIGABYTE GTS250 1GB DDR3 sink ZALMAN
7. NOX Urano ll 530W
8. ASUS USB-BT21 Mini Bluetooth
9. APPLE Magic Mouse
10. Logitech USB Keyboard
11. DVD-RW LITEON IHAS424 [LightScribe]
12. Monitor1 SONY SDM-HS53
13. Monitor2 SAMSUNG P2270 (Dual monitor = ok)
14. Monitor3 LEDTV LG 42SL90QR (HDMI = no)

10.6.2
00 - Add DTGP
01 - Fix CMOS reset
02 - Edit USB UHCI/EHCI - Part 1
03 - Edit USB UHCI/EHCI - Part 2
04 - Edit IDE (SATA)
05 - Edit PIC, TMR and HPET
06 - Add SBUS
07 - Enable HDEF Audio - ALC 889 + LegacyHDA.kext (different from multibeat)

"plop" before sound and optical out problem ...by... chang smbios.plist ---> MacPro4,1
##don't update Mac Pro Audio Update##
SOUND OUTPUT = 2 Channels both ANALOG (JBL Spyro) or DIGITAL (OPTICAL to SAMSUNG TX100 Home theater)

.... How to config 5.1 channels ?

 

[thelostswede]

OS X doesn't support 5.1-channel sound natively, sorry.
We're working on trying to get the optical out to work properly, as currently it only switches on, but there's no audio stream being transmitted.

You can try this, but I'm not sure it work 100% as I don't have any 5.1-channel speakers to test with, but I got sound by doing it that way at least and it might work for your audio codec as well.
viewtopic.php?f=16&t=525

 

[sssrs]

Thank you very much "thelostswede".
I see red light from SPDIF OUT.
I'm not test audio stream. I don't have optical cable.
I will test it soon.
I test SPDIF optical OUT.....!!!!!!!!!it works!!!!!!!!