I have DShot buzzer enabled on 4.5 dev, bluejay .19.2, and get no arming (or other) beeper sounds. Lost copter switch doesn’t cause a beep either.
Servo_dshot_esc=4 using Dshot600
I’m using a custom hardware definition of omnibusf4.
Beeper works on Betaflight and custom startup melody plays through motors in ardupilot.