The purpose of these test files are to identify the channels in an immersive playback system. The voice guides you quickly around the sphere. Then each channel play a range of sinus tones to verify level and bandwidth of reproduction. These test tones also serve to check transparency and properties of the codecs, including fold-down and headphone virtualization.
The tones start at 30Hz and ascend in octaves: 30 - 60 - 120 - 240 - 480 - 960 - 1.920 - 3.840 - 7.680 - 15.360
Dolby Atmos is streaming thru Apple Music, Tidal and Amazon HD
Stereo is a Dolby Atmos re-render to bineural 2-channel.
File formats and containers for download: MP4, MKV, FLAC, linear PCM WAV, Dolby ADM and MLP.
Codecs: Dolby Atmos DD+, Dolby Atmos TrueHD, Auro-3D, DTS:X and discrete channels interleaved WAV.
Channel order within interleaved WAV:
5: Ls (side/surround)
6: Rs (side/surround)
7: Lrs (rear/back)
8: Rrs (rear/back)
9: Ltf (height front)
10: Rtf (height front)
11: Ltr (height rear)
12: Rtr (height rear)
If your immersive speaker layout is 5.1.4 then please omit/mute channel 5 and 6 from these files. If your immersive speaker layout is 5.1.2 then please also omit/mute channel 11 and 12 from these files.