HDMI out to TV, no sound

[D. Hugh Redelmeier]

| From: Thomas Milne <thomas.bruce.milne-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org>

| If I have an HDMI out on my video card, and I connect to my TV, is that all
| I need? Should that convey the sound? The manual for the video card says
| nothing on the subject. There were no extra cables or anything, though some
| people seem to be saying you need to connect the video card to a sound
| device?

It depends on the card.  I'd bet almost all modern cards with HDMI-out
also support sound out on HDMI.

You were having problems with your GeForce GT 520 card.  That card
would have sound out.  See section 6.1.4 in
<ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html>
(Not sure why it is XFree86.)

There are different kinds of audio supported on HDMI.  Not all types
are supported by all cards.  From <http://en.wikipedia.org/wiki/HDMI>:

    For digital audio, if an HDMI device supports audio, it is required to
    support the baseline format: stereo (uncompressed) PCM. Other formats
    are optional, with HDMI allowing up to 8 channels of uncompressed
    audio at sample sizes of 16-bit, 20-bit and 24-bit, with sample rates
    of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz and 192
    kHz.[21][45] HDMI also supports any IEC 61937-compliant compressed
    audio stream, such as Dolby Digital and DTS, and up to 8 channels of
    one-bit DSD audio (used on Super Audio CDs) at rates up to four times
    that of Super Audio CD.[45] With version 1.3, HDMI supports lossless
    compressed audio streams Dolby TrueHD and DTS-HD Master Audio.[45] As
    with the YCbCr video, device support for audio is optional.
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