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. DolbyDigital is a surround sound technology that delivers audio in a horizontal 5.1 or 7.1 channel setup, while Dolby Atmos adds overhead channels to create a 3D sound experience. Dolby Atmos requires hardware with upward facing speakers, and is a better option if you have the budget for it. But there's so, so much more to this conversation. AnAtmos track consists of a "bed" stream and metadata: In cinemas, the bed stream is typically 7.1.2, which is the maximum that Atmos can be encoded with. Dolby Digital Plus and TrueHD allow for more channels than that (16 and 32, respectively), but if additional speaker channels are present, it's not an Atmos mix. DolbyAtmos audio codecs. Dolby Atmos is sound metadata rather than sound format, and only two codecs support the transfer of such data. We speak about compressed or uncompressed, depending on the playback source. Dolby Digital Plus. Dolby Digital Plus is an advanced audio compression technology that allows for the delivery of high-quality Toput that in perspective, lossless, two-channel CD-quality stereo in FLAC format uses 1,411 kbps — twice as much data as lossy, multi-channel Dolby Atmos via Dolby Digital Plus. Inearlier surround systems, each audio track was assigned to a channel, correlating to a specific speaker. A 5.1-channel system used 5 speakers plus a subwoofer. A 7.1-channel system used 7 speakers plus a subwoofer. Dolby Atmos systems can scale up or down, adding additional speakers as needed depending upon the size of the room. WhatIs Better? Dolby Atmos is better than Dolby Digital due to it being newer and has more advanced surround-sound capabilities such as supporting three-dimensional surround-sound instead of two. Config. If you're building a home theater, you must understand that both Dolby Digital, and Dolby Atmos are both mutl-channel surround-sound formats. DolbyAtmos and Vision for mobile. Dolby Vision® transforms your mobile viewing experience with dramatic imaging — incredible color, contrast, and brightness that bring entertainment to life. Dolby Atmos® delivers powerful, moving audio on your phone or tablet for bigger, better sound on the go. Learn More. nEtVT.