Gravely Zero-Turn Electronic Noises?

[Chowdadi]

I purchased my Gravely Pro-Turn 148 zero-turn mower from my local dealer on Aug. 26, 2025. Immediately upon shut off and while not running the mower makes strange electronic noises. Possibly it makes these noises when I'm mowing, but of course I can't hear them. My dealer says that this is unknown to them. My wife & I have recorded these noises. Anyone know what could be causing these electrical sounds?

See comparable noise links from YouTube below. I can't upload my telephone's audio.m4a files.

Thanks,

Turn the 2nd sound way down. It's much too loud.