To guarantee compatibility between devices, any device implementing the A2DP profile needs to offer a common codec, SBC. At the baseline, every set of Bluetooth headphones (or speakers) uses the low-complexity subband codec, better known as SBC. Bluetooth A2DP common header for SDK on Spresense. esp_err_t esp_a2d_register_data_callback( esp_a2d_data_cb_t callback) ¶. In other words, if your phone or portable media player can pack your music in either the SBC or AAC codec before transmitting it, but your For current stage, the supported audio codec in ESP32 A2DP is SBC. If a prompt appears on the pairing tool in the next step, confirm it. The recommended sub-band coding (SBC) codec supports up to 345 kilobits per second at 48 kilohertz. “MP3” audio is the more common reference to the MPEG-1 Part 3 audio compression standard.
To disable either codec via Terminal, simply replace -bool true with -bool false at … SBC codec in the telephony environment. That’s approximately one third the quality of standard CD audio-roughly the equivalent of a high-quality MP3 recording. A2dp codec Other codecs like mp3, aptX, or AAC can be implemented by device manufacturers as well.
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