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Digital Audio/Video => Movie/Multichannel audio => Topic started by: FLX90 on 2019-12-07 12:21:23

Title: Apple TV AAC/ALAC 7.1 SDDS
Post by: FLX90 on 2019-12-07 12:21:23
Hello,

according to the specification the default channel layout for 7.1 channels in AAC/ALAC is 7.1(wide) or SDDS (L R C LFE BL BR FCL FCR).
https://www.iis.fraunhofer.de/content/dam/iis/de/doc/ame/wp/FraunhoferIIS_Application-Bulletin_Fraunhofer-Surround-Codecs.pdf

This layout won‘t get much support on modern devices like my Yamaha Receiver.

Does someone know what happens when the audio stream is processed by e.g. my Apple TV?

AAC/ALAC 7.1 SDDS (Apple TV) —> PCM 7.1 (L R C LFE BL BR SL SR) (Receiver)
Or
AAC/ALAC 7.1 SDDS (Apple TV) —> PCM 7.1 SDDS (Receiver) (and Receiver looks for SR and SL so in fact he gets 6 channels)

Best
Felix
Title: Re: Apple TV AAC/ALAC 7.1 SDDS
Post by: FLX90 on 2019-12-18 16:35:35
I tested it.
FCL and FCR getting mapped correctly.
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