How to Sing Correctly i.e. with Correct Intonation. Κάνοντας το κόλπο του Μητροπάνου ίσως κάποιος-α να τραγουδάει σύντομα σαν την Μαρία Κάλλας?

At your risk.

Dimitris Mitropanos is a singer who starts the note at a lower pitch and increases it until it sounds right. He does it slowly in a funny way, as is the turntable playing the record gets to the right speed slowly.

It may be found that Maria Callas when for example singing Ave Maria does the same but getting to the right pitch quicker. But so may do so many other great singers such as Whitney Houston. Or great guitarists such as Dave Gilmour using the steel finger slide on the Great Gig in the Sky - Pink Floyd.