A-law, μ-law and CVSD digital audio CODEC in PCM interface

[haoye94]

Hi,

I am trying to use the BT stack library from bluekitchen to implement a bluetooth device that transfers audio to a bluetooth headset using the HSP profile. However, HSP profile uses CVSD modulation for the audio signals. If I am getting audio signals from an external CODEC that gives me PCM data through I2S, this means that I would need to use another CODEC to transform between PCM data and CVSD data.

I read the datasheet of ESP32 which indicates support for a "A-law, μ-law and CVSD digital audio CODEC in PCM interface". May I know whether the IDF has any support for this module yet?