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Downmix multichannel?
kr4:
As the number of source channels that some of us are faced with now greatly exceed the number of channels in our playback system, the issue of downmixing in MC is becoming important. For example, if I have a 14 channel source and specify a 7.1 channel output (playing now), what is happening? Are the additional channels simply ignored or is there a real downmix option? Do I have to do it manually?
(I searched the WiKi and found nothing relevant that was not archaic.)
eve:
--- Quote from: kr4 on September 18, 2024, 03:50:18 pm ---As the number of source channels that some of us are faced with now greatly exceed the number of channels in our playback system, the issue of downmixing in MC is becoming important. For example, if I have a 14 channel source and specify a 7.1 channel output (playing now), what is happening? Are the additional channels simply ignored or is there a real downmix option? Do I have to do it manually?
(I searched the WiKi and found nothing relevant that was not archaic.)
--- End quote ---
14ch source > 7.1 is going to need your own logic to downmix. What's the channel layout of the 14ch source supposed to be?
kr4:
Good question. This is a typical 14 channel file:
"03_Piano Concerto in C sharp minor, Op. 30 - 3. Allegro_ADMBWF.wav"
They also come in 10 and 12 channel varieties but without any annotation of channel identity.
Kal
AGAWA:
https://professionalsupport.dolby.com/s/article/Dolby-Atmos-ADM-Profile-specification?language=en_US
mattkhan:
Assuming they are atmos then I guess the channel lists in https://developer.dolby.com/globalassets/technology/atmos/additional-channels-for-immersive-audio.pdf should be accurate, I guess downmix to 7.1 is technically straightforward (mix the height channels into the corresponding base channels) but the weights to use are unknown
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