Sony 360 Reality Audio Sony 360 Reality Audio (360RA) vs 360 Spatial Sound Mapping

Two Sony names, two different jobs

Sony uses "360" in two product names that people constantly merge. 360 Reality Audio (360RA) is a music format. 360 Spatial Sound Mapping is a signal-processing feature inside Sony soundbars and home theater systems. A soundbar can be certified to play the first and ship with the second, which is where the confusion starts, but they do different work and neither replaces Dolby Atmos for movies.

What 360 Reality Audio is

Sony announced 360 Reality Audio at CES 2019. Fraunhofer IIS, which co-develops the underlying standard, wrote at the time that the format is "based on MPEG-H 3D Audio" and that, thanks to the underlying support of MPEG-H object-based audio, "the vocals, instruments and effects can be placed all around the listeners." The Sony release it republished says creators map sound sources such as vocals, chorus and instruments with "positional information of distance and angle," and that the distribution format would comply with MPEG-H 3D Audio, an open audio standard. Sony planned to put compatible content on the premium plans of music services.

Existing multitrack recordings can be converted using Sony's production tools. Playback needs an MPEG-H capable decoder: Sony's October 2021 announcement noted that Android 12 supports MPEG-H 3D Audio, which makes it easier for makers to build compatible devices. That announcement also described how the format was available through Tidal, Deezer, Nugs.net and Amazon Music HD, with Amazon Music Unlimited then adding playback on any headphones. The catalog had grown to approximately 7,000 songs at that point. The same release lists 360RA-compatible Sony hardware, including the HT-A7000 and HT-A5000 soundbars, the SRS-NS7 neckband speaker and the HT-A9 home theater system, and says Audio-Technica headphones, Sennheiser soundbars, McIntosh AV processors and the Amazon Echo Studio were announced by other companies. Which services carry 360RA today was not verified for this entry; check a service's own page before buying hardware for it.

What 360 Spatial Sound Mapping is

360 Spatial Sound Mapping is processing, not a file format. In the HT-A7000 help guide, it is a setting under Setup, Advanced Settings, Audio Settings, 360 Spatial Sound Mapping, with an on/off choice. Sony's Immersive Audio Enhancement function works only when that setting is on, or when Sound Effect is set to Sound Mode On, and it works "for the 2.0 channel signal such as TV programs." With Dolby Atmos content, Sony's guide says Immersive Audio Enhancement "is always set to ON and cannot be changed."

Audio Advice, reviewing the BRAVIA Theater Bar 8 ($998) and Bar 9 ($1,498) at launch pricing, says the technology creates 5 phantom speakers: some to the left and right of the bar for a wider soundstage, one slightly above the bar so dialogue seems to come from the TV, and two phantom Atmos speakers overhead using the up-firing drivers. The two bars differ in hardware: the Bar 8 is about 43 inches long and the Bar 9 about 51 inches, both around 3 inches tall and 4.5 inches deep, and the Bar 8 has four front woofers, one large center tweeter, two smaller edge tweeters, two side drivers and two up-firing drivers (11 drivers by that count; the Bar 9 adds extra radiators and drivers). Room calibration runs in the BRAVIA Connect app using a phone's microphone, measuring where the bar, the optional rear speakers and the optional subwoofer sit, and the reviewer found calibration made the bar "sound so much better in your room." The app lets you switch the sound field between 360 Spatial Sound Mapping, Dolby Speaker Virtualizer and DTS Neural:X; the reviewer preferred 360 Spatial Sound Mapping at the default height setting.

Sony has not published, in the pages checked, the algorithm, the number of calibration test tones, or the latency the processing adds. Treat per-model phantom-speaker counts in marketing copy as vendor claims.

360 Reality Audio vs 360 Spatial Sound Mapping

360RA is what you play. It is an MPEG-H 3D Audio stream describing objects positioned in a sphere, authored once and rendered per device. 360 Spatial Sound Mapping is how the bar plays everything else: stereo TV, Dolby Atmos, DTS:X. A bar with 360 Spatial Sound Mapping that does not support 360RA is still a good Atmos bar; a 360RA-certified headphone gets nothing from the soundbar processing.

For video, the format that matters is still Atmos or DTS:X. Sony's HT-A9 guide states that the system "supports object-based audio formats such as Dolby Atmos and DTS:X as well as HDR video formats such as HDR10, HLG, and Dolby Vision." The Audio Advice review adds that Bar 8 and Bar 9 are IMAX Enhanced certified when paired with the rear speakers, and that non-Atmos stereo and movies can be upmixed by Sony's upmixer, which also detects human voices to isolate them (see dialogue enhancement).

Where each one lives

360 Reality Audio: Sony headphones through the Headphones Connect app (the 2021 release says its HRTF optimization is not available with Amazon Music Unlimited), Sony's SRS-NS7 neckband speaker, and the soundbars named above. 360 Spatial Sound Mapping: Sony's HT-A series soundbars and home theater systems; the Audio Advice review covers the HT-A8000 (Bar 8) and HT-A9000 (Bar 9), and the Sony guides cover the HT-A7000 and HT-A9.

Newer Sony BRAVIA Theater models can carry different names for related processing, and none were verified here. Read the specific model's help guide for the exact menu name.

Common confusions

"360" does not mean full-sphere playback on a soundbar. A single bar with up-firing drivers creates phantom positions, and results depend on ceiling height and surface. The review's own advice is to run calibration and then experiment with sound field choices.

360RA is not Dolby Atmos Music. Both are object-based music formats (see Dolby Atmos Music), but they are built on different technology: MPEG-H for 360RA, Dolby's own codecs for Atmos.

Compatible does not mean the same hardware chain. A soundbar listed as 360RA-compatible plays the 360RA music stream through its own renderer, while its movie sound goes through Atmos or DTS:X decoding, as the HT-A9 guide describes.