DOCS/options: altered spdif passthrough warning

[kwerner72]

The warning for not using spdif passthrough, does not take 3D audio formats into account.
Only when having up to 8 channel sources, decoding to PCM is feasible. With 3D audio formats like Atmos, Auro, ... passthrough needs to be used.

[sfan5]

I think the warning is still applicable, but partially.
Audio passthrough is complex, prone to issues (e.g. #8403) and not supported everywhere. We shouldn't be encouraging it in general unless as you said the user has some fancy proprietary format.

[kwerner72]

Would agree that in most cases passthrough should not be encouraged.
So instead of removing the warning as a whole, it now has been altered.

[christoph-heinrich]

I don't have any opinion on this change in general, but it says FFmpeg's new DCA decoder. We could get rid of the new, because eventually it won't be new anymore (which is probably already the case, I didn't check).

[kwerner72]

I don't have any opinion on this change in general, but it says FFmpeg's new DCA decoder. We could get rid of the new, because eventually it won't be new anymore (which is probably already the case, I didn't check).

Sorry, dont know about the current state of DCA decoder, if it shoud still referred to as 'new' or if it is not needed anymore.

[christoph-heinrich]

I don't have any opinion on this change in general, but it says FFmpeg's new DCA decoder. We could get rid of the new, because eventually it won't be new anymore (which is probably already the case, I didn't check).

Sorry, dont know about the current state of DCA decoder, if it shoud still referred to as 'new' or if it is not needed anymore.

It's not like that sentence becomes invalid when the new isn't there anymore. I don't see any value in it being there, even if the decoder is still recent enough to be considered new, and by removing it now there is no need to do so in the future.

[kasper93]

Suggested change

	In general it is not recommended to use passthrough, since HDMI
	supports uncompressed multichannel PCM, and mpv supports lossless
	DTS-HD decoding via FFmpeg's new DCA decoder (based on libdcadec).
	Nevertheless there are some cases in which it must be activated for
	correct playback, such as 3D audio formats like Dolby Atmos or DTS:X.
	Generally, passthrough is not recommended because HDMI supports
	uncompressed multichannel PCM, and mpv supports lossless DTS-HD decoding.
	However, there are cases where passthrough must be enabled for proper
	playback, particularly for 3D audio formats such as Dolby Atmos or DTS:X.

How about something like this? Particularity mentioning "new" (now almost 10 years old) decoder is not important detail.