Its metadata or wrapper that sits on top of an existing Dolby codec. Either Dolby TrueHD (lossless) or Dolby Digital Plus (lossy). I stopped caring after ac3/DTS because all the news audio "advancement" looked like snake oil. I'm going to strongly disagree with you on this. AC3 (the original Dolby Digital) is a really old lossy digital codec
DolbyAtmos. Where Dolby Digital is an audio format, Dolby Atmos is a surround sound technology that adds height to the audio. This creates a three-dimensional soundscape with audio from above and below the listener through additional in-ceiling and up-facing speakers. Dolby Digital Plus
WithAtmos active and 4 (or 6) height speakers it circles at the ceiling, all lower channels are silent. With just two height speakers the helicopter moves forth an back from side to side. without Atmos (or Atmos forced switched off due to a 5.1 system) the helicopter circles through the lower speakers.
TIDALs Dolby Atmos Music streams use Dolby Digital Plus encoding. Atmos audio in Dolby Digital Plus is typically encoded at bitrates between 384 and 768 kilobits per second. CD-quality is 1,411 kbps. To me stereo sounds better, with Atmos, there is a definite loss in the high tones. It might be good for dance music but I do not like it
However the extra channels are just the beginning: as we noted in Dolby Atmos for Home Cinema, Dolby Atmos utilizes three distinct elements: Bed Audio: these are channel-based stems, in 5.1 or 7.1, effectively identical to former surround-formats. The individual channels are static inside the bed. Object Audio: these are mono- or stereo
Withthe right TV, Dolby Digital Plus can also be used for Dolby Atmos, using the Arc's up-firing speakers for overhead channels. Atmos is a game-changer, with the Arc able to fill a room.
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dolby digital plus vs dolby atmos which is better
