Strange music tone when powering down solo

[locutus]

When I power down solo, a musical file plays. Never heard it before. It only happens if the radio is connected.
I listened to the pichawk wav files from an earlier post and it is not there.
I tried to post a link but it does not except this type of file.

 

[pyrate]

its new with 1.3 normal

 

[locutus]

Oh good!