Aqua Lung Titan Classic 3rd Generation Regulator Black

what are opening ports sizes on the first stage, lo/ high pressure; what size is the opening port on the regulator second stage?

The pictures and description indicate that this is a new Titan, third generation (2018). Is it so?

Is the yoke setting still available? There’s no option to choose.

I got this and was just wondering about something that happens when you breath into it on the surface. It makes a harmonic sound when you exhale