How do I turn off the startup sound on my Xperia tablet?

[DOHBOI]

Ever since the last update, my tablet plays an annoying little jingle.

I looked everywhere in the settings, nothing. 

I downloaded the manual, nothing.

Im ready to throw the thing, but I love it too much.

Someone please tell me how to end this madness!

Thank you

[JanIrv]

Agree! Hate the whole 'new' start up and have lessened my use of tablet since 😕 this should have been added as an optional extra and not

 as some forced 'improvement'. That loud announcement sound is embarrassing and dated. Not impressed Sony!

[JanIrv]

My young son watches his youtube videos on the tablet until there is no battery. You're solution while simple and obvious doesnt work in this house. Smothering the tablet with several pillows is by far the better if not even more ridiculous solution! This is not 1992 and I dont need to bell whistling all dancing sound to announce to all around me that I'm turning on the tablet. 

[baltiger]

Where and how to find the bootanim.mp3 file on the xperia tablet so that I can eliminate the annoying boot up sound? Thanks.