Not sure I follow why Atmos and lossless are mutually exclusive. For video Dolby TrueHD is lossless and it includes Atmos. The album is labeled lossless and spatial.
I don't doubt that it's possibile to have a lossless Dolby Atmos.
In the case of Apple Music I think that Apple decided to keep Dolby Atmos in AAC for now. Probably for bandwidth. I'm not a Dolby expert. I see that it can carry up to 128 channels.
I've downloaded on my Mac Ariana Grande's track
imagine from
thank u, next album marked, as you stated, lossless and Dolby Atmos. I think it's rather lossless
or Dolby Atmos.
The downloaded file
01 imagine.movpkg is a package which contains a subfolder
Data. The
.data file inside it contains, among other things, an index of the various versions (emphasis is mine to spot easily main informations):
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-stereo-256-binaural",AUTOSELECT=YES,CHANNELS="2/-/BINAURAL",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-stereo-256-downmix",AUTOSELECT=YES,CHANNELS="2/-/DOWNMIX",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-stereo-256",AUTOSELECT=YES,CHANNELS="2",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=
"audio-HE-stereo-64",AUTOSELECT=YES,CHANNELS="2",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-HE-stereo-64-binaural",AUTOSELECT=YES,CHANNELS="2/-/BINAURAL",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-HE-stereo-64-downmix",AUTOSELECT=YES,CHANNELS="2/-/DOWNMIX",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-stereo-128",AUTOSELECT=YES,CHANNELS="2",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=
"audio-stereo-128-binaural",AUTOSELECT=YES,CHANNELS="2/-/BINAURAL",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-stereo-128-downmix",AUTOSELECT=YES,CHANNELS="2/-/DOWNMIX",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=
"audio-alac-stereo-44100-24",AUTOSELECT=YES,CHANNELS="2",NAME="songEnhanced",SAMPLE-RATE=44100,BIT-DEPTH=24
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-atmos-2448",AUTOSELECT=YES,CHANNELS="16/JOC",NAME="songEnhanced"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="
audio-atmos-2768",AUTOSELECT=YES,CHANNELS="16/JOC",NAME="songEnhanced"
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=264995,_AVG-BANDWIDTH=264995,BANDWIDTH=267287,CODECS="
mp4a.40.2",STABLE-VARIANT-ID="d8cb7044e68ba2036c03274d24e70ef6a1c6375b35fce16fae5632f4070007d5",AUDIO="
audio-stereo-256-binaural"
P293742664_A1450330590_audio_en_gr256_bm.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=260511,_AVG-BANDWIDTH=260511,BANDWIDTH=271347,CODECS="
mp4a.40.2",STABLE-VARIANT-ID="eac10af3428251ee2f8c056eb966570d813b967fd5027667c83bf865953a772c",AUDIO="
audio-stereo-256-downmix"
P293742664_A1450330590_audio_en_gr256_dm.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=259294,_AVG-BANDWIDTH=259294,BANDWIDTH=268186,CODECS="
mp4a.40.2",STABLE-VARIANT-ID="1098626e2bc698d3fea380193f55075503656719bdbd2e09647c2ee7be8ae66b",AUDIO="
audio-stereo-256"
P293742664_A1450330590_audio_en_gr256.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=70918,_AVG-BANDWIDTH=70918,BANDWIDTH=75373,CODECS=
"mp4a.40.5",STABLE-VARIANT-ID="7f82811019138e2e2c0dcb6d6ae14ee0bb30d90dba7831696b9260759d814dfe",AUDIO="
audio-HE-stereo-64"
P293742664_A1450330590_audio_en_gr64.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=74656,_AVG-BANDWIDTH=74656,BANDWIDTH=76988,CODECS="
mp4a.40.5",STABLE-VARIANT-ID="ee326e45b1d644ad57f56a20971eca4c967802c57db831bef805ffa4ae30c4d1",AUDIO="
audio-HE-stereo-64-binaural"
P293742664_A1450330590_audio_en_gr64_bm.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=71685,_AVG-BANDWIDTH=71685,BANDWIDTH=77809,CODECS="
mp4a.40.5",STABLE-VARIANT-ID="b24912204d3bd110e11669069ed0f3d9eaa20ecdadd241cbaba7d58ce284ea17",AUDIO="
audio-HE-stereo-64-downmix"
P293742664_A1450330590_audio_en_gr64_dm.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=132080,_AVG-BANDWIDTH=132080,BANDWIDTH=139028,CODECS="
mp4a.40.2",STABLE-VARIANT-ID="dfb08389c21b5b8cff34ac9c3ff2ab65cd0eb4ab896eecde483241dab02604db",AUDIO="
audio-stereo-128"
P293742664_A1450330590_audio_en_gr128.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=134888,_AVG-BANDWIDTH=134888,BANDWIDTH=137584,CODECS="
mp4a.40.2",STABLE-VARIANT-ID="d68193e91e715e107dd1b1d76e3779a57b67c4f7ea67c909510add1cb9e23e95",AUDIO="
audio-stereo-128-binaural"
P293742664_A1450330590_audio_en_gr128_bm.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=131847,_AVG-BANDWIDTH=131847,BANDWIDTH=137378,CODECS=
"mp4a.40.2",STABLE-VARIANT-ID="2659ce21a0707f412ce382b2c096554c6443d3beb1c51948401e48160d591963",AUDIO="
audio-stereo-128-downmix"
P293742664_A1450330590_audio_en_gr128_dm.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=1650502,_AVG-BANDWIDTH=1650502,BANDWIDTH=1745984,CODECS="
alac",STABLE-VARIANT-ID="561e16644b039475f6a2aa0739a2281398f639ee7934180c027ec4042f1bbee8",AUDIO="
audio-alac-stereo-44100-24"
P293742664_A1450330590_audio_en_gr2116.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=450221,_AVG-BANDWIDTH=450221,BANDWIDTH=450191,CODECS="
ec-3",STABLE-VARIANT-ID="5ac776f49c9709c22da6c83f603d6354be78b352e9ae3122f6b2043953319443",AUDIO="
audio-atmos-2448"
P293742664_A1450330590_audio_en_gr2448.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=770212,_AVG-BANDWIDTH=770212,BANDWIDTH=770191,CODECS="
ec-3",STABLE-VARIANT-ID="bb1ee4d3bea1c3fb25f0795af98d2b9a25825c28bcab87b05ac383062aee8ab0",AUDIO="
audio-atmos-2768"
P293742664_A1450330590_audio_en_gr2768.m3u8
The codecs of the two Atmos versions are marked as EC-3 which is a lossy format. The only ALAC version is the 44.1 kHz/24 bit.
I've downloaded then another song from another album which isn't Dolby Atmos. It contains of course only AAC and ALAC versions.
Dunno. It is Apple's playlist so they are advertising the tracks as being spatial. I haven't found spatial to be that compelling. For me the quality of the original recording is an order of magnitude more important.
I agree. Spatial Audio still has to convince me that it's better.
Sure, it's different. This is the main selling point from Apple. The average Joe can easily notice the difference between regular stereo and Dolby Atmos + Spatial Audio. The same can't be said for AAC/ALAC differences.