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I have an Asus motherboard with a GeForce 550 Ti, connected to a TV over HDMI. The problem is I can't get any sound out of the TV from the computer. However, the command:

aplay -D plughw:NVidia,7 /usr/share/sounds/alsa/Front_Center.wav

Does produce output, the sound comes through the TV fine. I have the latest version of the driver from NVidia installed, and the graphics card shows up fine in system preferences. Any ideas?

Edit: I don't get any sound with OS X Lion (Hackintosh) either, but I can get sound out of both OS's through the built in headphone port.

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Year of Linux on the desktop, I say. –  ta.speot.is Nov 13 '11 at 7:30
Check your PulseAudio settings. There was a tool to do that (to configure your output, etc), but it's been a long time since I've worked with Linux. (E.g.: Fight daily to listen to music, read my email, etc.) –  Shiki Nov 13 '11 at 23:42

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