You can change
CODE: SELECT ALL

#define BTA_DM_PM_SNIFF3_MAX 150
to
CODE: SELECT ALL

#define BTA_DM_PM_SNIFF3_MAX 180
and test again. Please provide feedback on your test results, thank you very much!

I've completed additional testing with the above change to SNIFF3_MAX. There was no ...

I will try some testing with this sniff change. However, I think this sniff mode bug is a separate issue from the original SCO link problem... is that correct?

Regarding SCO link quality and retries:

This is a known issue which caused by that our hardware is not able to receive retransmitted sco ...

Thanks for confirming issue with sniff mode!

Regarding the original issue, SCO packet loss:
This is a known issue which caused by that our hardware is not able to receive retransmitted sco packets from the peer device.

1. Will there also be a fix for SCO packet retries in the next IDF release?
2 ...

Thanks for the note on hardware limitation esp-jc. A few follow-up questions:
Is there a workaround to the HW limitation that can improve audio quality?
Will there be a future update to the BT controller lib that will help?

I have some additional observations from testing that may be useful for ...

IDF v4.3.2 - v4.4.1
Hardware: ESP32-WROOM-32E module (ESP32-D0WD-V3 + 16MB flash)
https://espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf

I'm using the Bluetooth HFP AG profile in IDF v4.3.2 to connect a headset with WBS audio. In my application I ...