HDMI audio output

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https://bbs.archlinux.org – I'm having problems trying to get my HDMI audio output to work correctly. By default, with or without and external monitor connected, the audio is heard from my notebook speakers (or from the headphones, when I plug them in). My external speakers are connected to the external HDMI monitor, so they should sound whenever the HDMI audio output is being used.The controls/levels I get in alsamixer are these:I'm not sure if S/PDIF corresponds to the HDMI output, but it doesn't have a level bar (maybe that's normal?).I found a section in the wiki regarding my problem, but it doesn (HowTos)