5.1 Sound via HDMI in Windows 7

Hi there,
I have a MBPr and have got the sound working via internal speakers and also can get surround sound via the optical connection. I'm trying to get surround sound working via the HDMI port though, but so far have had no luck.
The system reports that there are only 2 channels available via the HDMI. Orginally it had them listed as nvidia HDMI Digital Audio, but after me messing around it's just labeled as generic HDMI Audio.
Has anyone managed to get this working correctly? If so which drivers are needed as Windows just installs the generic ones. I've tried the Cirrus Logic and also the nvidia drivers, but they aren't recognised.
Any help would be appriecated.
Thanks.

Same problem here. Did you ever figure it out?

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Message Edited by Slybo on 12-23-2008 06:22 AM
Message Edited by Slybo on 12-23-2008 06:24 AM
This question was solved.
View Solution.

I also have this problem my laptop is a Pavillion dv6000, when i first got my Sharp LCD every thing worked fine, i had both video & sound now my sound doesn't work. I cant point to exactly when my sound stopped working exactly, but i do let the computer do the regular updates with the HP update service. reading else where http://www.fixya.com/support/t1284552-hdmi_audio_not_appear_installed_hp it appears the problem may have occurred after one of the updates.

5.1 Sound via HDMI in Windows 7

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