I've recently been writing a program to 'probe' HDMI monitors or screens to
see what audio modes they accept. The results have prompted me to wonder
about their limits.

I've only seen results from a few. But all the ones I've got data on only
work for LPCM sample rates up to 48k max. Which would leave 'high rez'
audio out in the cold. (And when sent 44.1k the seem to dumbly resample it
48k upon reception).

That gives me the feeling that the expectation in TV is that 48k is the
'standard', so they cannae be bothered, 48k rules.

Afraid the program I'm using only works on RISC OS. So it would be for
others to say how you'd check this using other approaches. But I'd be
interested to know what people can find out here. Any TVs/monitors that
accept 96k/24 LPCM?

Please note that it may be possible to 'play' a 96k/24 file and hear
audio, but it is working because the actual transfers are being downsampled
and sent as 48k. So simply being able to play such a file over HDMI and
hear it doesn't show it is actually being sent and played as 96k.

Note also that I'm not concerned here with non-LPCM formats or their
bitrates. Just with stereo LPCM.

Jim

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Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
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Audio Misc http://www.audiomisc.co.uk/index.html

Jim Lesurf wrote:

I've recently been writing a program to 'probe' HDMI monitors or screens to
see what audio modes they accept.

My "3K" miniDP monitor only claims to support 16/20/24bit audio
at 32/44.1/48kHz, it's more convenient to plug the speakers in there
than into the PC. The PC's soundcard does claim 96/192kHz but I doubt I
could tell the difference on el-cheapo speakers ...

In article , Andy
Burns
wrote:

My "3K" miniDP monitor only claims to support 16/20/24bit audio at
32/44.1/48kHz, it's more convenient to plug the speakers in there than
into the PC. The PC's soundcard does claim 96/192kHz but I doubt I
could tell the difference on el-cheapo speakers ...

My suspicion is that 16/20/24 bit is accepted because that reflects the way
the spdif spec was extended fairly early on. In effect, it covers the
various bit-clock rates to be expected for the sample rates up to 48k.

Indeed. out (Panasonic) TV seems to send out 48k 20bit via its optical
output.

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html