I flash the demo a2dp hfp sink program as you do. In a2dp, I can hear the music without issues. However, when I switch to HFP, I can hear some clear popo noises, and the tone of the voice changed as well. I suppose it has something to do with the DAC, since during the swithing from A2DP to HFP, the ...

HFP spec only support 8khz with cvsd codec, and 16khz with msbc, therefore it is very normal that you got a bad sound quality.

使用44.1k sbc a2dp进行播放时没有杂音问题。在播放过程中打电话将dac切到8k的时候就会有很明显的popo音。我的开发板是官方的ESP32_LyraT 4.3，请问这是开发板硬件问题（在别的开发板上可以复现改问题吗？），还是SDK本身的问题。尝试用16khz播放sco音频。将bta_hf_client_cb.msbc_enabled = TRUE; 打开msbc解码后，手机能够选择msbc解码会发送+BCS:2,但是软件会卡住，HFP会有timeout显示。当前git最新版本无法支持msbc解码？

附件为MSBC解码时的log

尝试切换到msbc解码发现当前git最新sdk完全无法使用msbc

使用一块ESP32_LyraT 4.3开发板编译烧录esp-adf\examples\get-started\pipeline_a2dp_sink_and_hfp示例工程后发现在hfp模式下通话有杂音。

附件为LOG