[upd]: Realtek High Definition Audio -hda- Version R2.8x -9239.1- Whql

The “AEC” (Acoustic Echo Cancellation) was improperly enabled for non-skype applications. Fix: Registry edit:

Version identification and verification

represents a specific branch of audio drivers developed by Realtek Semiconductor Corp. for their integrated audio chipsets. This driver is designed to facilitate high-quality audio playback and recording on Windows-based systems, serving as the communication bridge between the operating system and the onboard audio hardware (codecs).

Certified by Microsoft Windows Hardware Quality Labs on September 27, 2021.

6.0.9239.1 (often packaged as R2.8x Pack Version 4.78). Release Date: September 16, 2021.