A modest reply to Christian Lindberg´s statement about why not to buzz.
I stumbled over this short video with Christian Lindberg talking about why you should not buzz. Christian, I truly respect you as one of the worlds very finest trombone players ever, but I have to disagree with you on this one.
I would argue that what you in your video call your best effort on a beautiful sound on the mouthpiece, is mainly getting as much sound pressure out of it as possible. That is the equivalent to forcing more air through the trombone, than the embouchure for the given note you play allows. That too, will result in a squeezed sound with few overtones.
Rather opposite, a soft, airy mouthpiece sound is what will trigger a full sound on the trombone. Getting a good sound on the trombone (or any brass instrument), is about finding the easiest way to get the air out of your body and through the instrument, starting at your toes and following it through the bell of your horn. In the video below that I made on the subject, I have made an attempt to showcase that. (Since I am not particularly happy to hear my own voice recorded, I have chosen to hide behind written words and practical examples instead.)
Buzz and become a better musician
Besides building up embouchure, buzzing is a great tool for brass players to become a better musician. In the end of the video, I play a blues solo on the mouthpiece while moving the slide accordingly (admitted, the pitch is not perfect all the way, but I still find this useful as long as I at least can hear what note I intended to play). For me as a jazz player, this is a great way to connect what you actually hear and can relate to while playing. Regardless if you play improvised jazz, or classical etudes, you have to be able to hear the next note before you play it in order to make music out of it. Once you play it, it is too late to start thinking of how to phrase or pitch it. That should take place in your head in advance.
So dear Christian, while I am in absolutely no position to help you improve your trombone playing, I would love to take on the challenge of giving you some ways to use buzzing to improve your overall musicianship. Let me know if your are up for a challenge!
Jazz trombone player and slightly hubris plagued buzzer