I had the same problem here. I realized I have to manually switch the input port of the ADC. More precisely, write 0x50 to the ADC control register 2 of the ES8388. Hope this helps. Oba

Hi,

I am having problems with the audio quality of the bluetooth HFP.

Hardware: ESP32_LyraT V4.3
Software: esp-idf V3.3, esp-adf v2.0-beta2-24-g40cb926
Example project: \esp-adf\examples\get-started\pipeline_a2dp_sink_and_hfp (unmodified)

I built the pipeline_a2dp_sink_and_hfp project, and ...