The Volume Control icon in the system tray is ... When done, in the Sound Control Panel, verify which device is your system default and return to your desktop. Next, type “Device Manager ...

As discovered by Mishaal Rahmen, the new volume panel in Android 15 will show much thicker sliders for each volume control. Previously, the sliders for each volume control were paper-thin.

you can disable this Low Volume feature in Windows as follows: Open Control Panel > Hardware and Sound > Sound > Audio properties page > Communications tab. You can also open the Sound settings ...