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AAC Bluetooth codec only acceptable on Apple phones ...
https://soundguys.com/the-ultimate-guide-to-bluetooth-headphones-aac-20296/#:~:text=The%20AAC%20audio%20format%20supports%20audio%20quality%20up,the%20type%20of%20device%20it%E2%80%99s%20being%20used%20with.
Advanced Audio Coding (MPEG-4) - loc.gov
https://www.loc.gov/preservation/digital/formats/fdd/fdd000114.shtml
Common name: AAC. Description: Perceptual audio encoding format designed for efficient distribution of sound files over moderate bandwidth connections; may be used at higher data rates for better fidelity. AAC_MP4 compression is a further refinement of AAC_MP2. AAC_MP4 is an object-based coding standard; decoders for AAC_MP2 may not be able to read …
Advanced Audio Coding (MPEG-2) - loc.gov
https://www.loc.gov/preservation/digital/formats/fdd/fdd000036.shtml
It also provides 5.1-channel coding at an overall rate of 384 Kbps. According to Mpeg.org AAC "is able to handle . . . 48 full audio channels and 16 low frequency enhancement ones compared to 5 full audio channels and 1 low frequency enhancement one for MP2 or MP3." Support for user-defined sounds, samples, and patches: Not investigated at this time.
Advanced Audio Coding - VideoLAN Wiki
https://wiki.videolan.org/Advanced_Audio_Coding/
High Efficiency AAC (aka aacPlus), is a lossy data compression scheme for audio streams, and is part of the MPEG-4 Part 3 specification. HE-AAC combines Advanced Audio Coding (AAC) with spectral band replication (SBR) He-AACv2 / eAAC+. Enhanced aacPlus combines SBR and Parametric Stereo (PS).
audio - Is there a specification for AAC-LC (de ...
https://stackoverflow.com/questions/18276003/is-there-a-specification-for-aac-lc-decompression
AAC (Advanced Audio Coding), including the LC (Low Complexity) profile, was originally specified in ISO/IEC 13818-7 (MPEG-2 Part 7). It was later updated by ISO/IEC 14496-3 (MPEG-4 Part 3); subpart 4 covers AAC specifically, and subpart 1 (Main) is likely to also be helpful. General information can be found on the Wikipedia page.
AAC Bluetooth codec only acceptable on Apple phones ...
https://soundguys.com/the-ultimate-guide-to-bluetooth-headphones-aac-20296/
The AAC audio format supports audio quality up to 24-bit 96kHz, but in the Bluetooth space, we are limited slightly below CD quality at best. In this article we take a deep dive into some objective measurements to see how AAC compares with CD quality and SBC, and how that performance can vary depending on the type of device it’s being used with.
Core Audio Format Specification - Apple Developer
https://developer.apple.com/library/archive/documentation/MusicAudio/Reference/CAFSpec/CAF_spec/CAF_spec.html
For example, the MPEG-4 Advanced Audio Coding (AAC) data format uses a variable bit rate but a constant number of frames per packet. To describe a CAF file of 2 channel Low Complexity Audio Object format AAC data with a sampling rate of 44,100 frames per second (for the decompressed data), you would use the Audio Description field values in Table 2-6 .
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