I made a little video; https://www.youtube.com/watch?v=dOjKTPaDsOA
Sounds like it needs a little tuning.
First I would grease the ratchet as it seems the motor is stopping too soon.
Then try adjusting the screw one click at a time in and out and see what sounds best.
Some new gaskets are too thick, and that can affect the sound.
Ensure the diaphragm is clocked properly with the drain hole at 6 o’clock.