Problem with the reference levels of the Dolby tests about cavern

[VoidXH]

That does not have any reference levels, that file is not channel wav. It is object ADM.

There's only one audible object at a time, the volume difference is still caused by Cavern's mixer for some reason which needs fixing.

[VoidXH]

But ADM is converted (rendered) to channel PCM. Would not changing reference levels in ADM change PCM?

Changing the mixer won't affect ADM, because ADM is exported without mixing to the selected environment.

[VoidXH]

Levels are correct in 1475f9e and in the latest binary release. In this file's case, the overall gain is -3 dB, this can change from content to content and is normal.

[VoidXH]

But it is now slighly lower, is that expected?

Yes. Atmos content is always mixed lower.

[VoidXH]

Not those gains, the JOC matrix.

[kaedewang]

I decode https://download.dolby.com/us/en/test-tones/dolby-test-tones_7_1_4.mp4 by cavern.
But I think there are some problems, please check:

1. channel 5/6<->7/8 order is reversed with DRP.
2. channel 12(trr) is very strange, it outputs with channel 9(tfl) together.
3. When 1 channel is outputing, others are not mute.

[VoidXH]

Reproduced, tracked in #56.

[VoidXH]

Fixed and released, the bug was the top rear right's incorrect location. The channel order is correct in Cavernize, all PC standards use F R C LFE RL RR SL SR as the beginning, this includes WAV. Cavern is using WAVEFORMATEXTENSIBLE, which means the channels are labeled and players/converters can use this information to remap them when needed.