Corolla 2016 - Beep sound and stop music note sign in audio player when car starting

Hi all!

When I start the car, I can hear a short beep sound for a second coming
from the audio player. I used to see a red music note with a NO sign. But
now, I see a white music note with a NO sign instead. Please see the
attached photo.

My question is how to get rid of this short beep sound. And is there
something wrong with car's audio?

I cannot find anything in the manual regarding this icon.

Thanks a lot.


It means that no audio player (or a player mode from a phone) is connected. This display can be set in Setup-Bluetooth. The beep, I have no idea.