Something about the different keys!
-> click here

Something about the different valve-sections!
-> click here

Something about breathing!
-> click here

Which effects have different metals on the sound?
-> click here

A great website for trombone slide position:
www.aniellosessa.com

From Dr. Jürgen Faißt: "Trombone slide position chart" and “Overtone series” for the basstrombone!

-> click here to get the pdf-document “Slide positions”
-> click here to get the pdf-document “Overtone”