Just started playing the trumpet again after an extended break of more than a few decades. I've been looking on the Internet for info on aperture and embochure development (desktop computers and the internet didn't exist when I first started playing in Jr. High). It seems that there are several approaches to the embochure such as Farkas, Superchops, Maggio, Stevens, etc. along with other terms like downstream and upstream playing as well as corner tightness. These terms are all pretty new to me and are a bit confusing. Is there a good overall resource out there that covers these along with specific exercises and illustration on how to develop the right aperture. I'd like to get off to a good start before re-developing bad habits.