Maximum and minimum bit pool used in quantization process: usually 2 to 53.Quantization bit allocation algorithm: Loudness, Signal-to-noise ratio (SNR).Number of audio blocks in one audio frame: 4, 8, 12, 16.Audio channel (type and number): Joint Stereo, Stereo, Dual Channel, Mono.SBC has a lot of different parameters which are negotiated during the connection setup phase: It works best with cheaper audio devices that do not support additional codecs - aptX, aptX HD, AAC or LDAC.
The feature is available on all devices with LineageOS support, and can be used by the overwhelming majority of existing Bluetooth playback devices. The new bitrate of 452 or 551 kbps depends on the Bluetooth device’s maximum Enhanced Data Rate and is a clear upgrade from the stock 328 kbps when using Joint Stereo mode. Enabling this setting will toggle the Dual Channel mode, which offers an improved bitrate much higher than the one available in the stock SBC codec. It introduces support for SBC Dual Channel mode with the eXtreme quality profile (SBC XQ), bumping this old codec’s audio quality to levels on par with Qualcomm’s proprietary codec - aptX HD.Īn additional “HD Audio: SBC” checkbox is available in users’ Bluetooth audio device settings, as long as they are running a LineageOS 15.1 build created on or after the 31st of March 2019, or a 16.0 build created on or after the 13th of May 2019. LineageOS 15.1 and 16.0 bring a unique audio quality enhancement to the stock Bluetooth SBC audio codec.
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