Bernapaslah dari diafragma Anda. Getarkan bibir Anda. Cobalah mengganti nada tanpa menekan kunci. Tekan kunci dengan benar.

Given the above summary, write a detailed text in English for it.
Remember, this is a big instrument, so your air needs to be big and fast to get the sound out out of the horn. Breath deep down into your diaphragm, not up high in your throat. That air has a long way to go, so start it out from a place of power. Unless you're playing a Sousaphone in a marching band, the goal is not to blow all of your air reserves through the horn at once, but to keep your diaphragm taunt. If someone were to punch you in the stomach, you should stay tight and not collapse. Tense your abdominal muscles while you play and while you blow. While blowing, close your lips to the point that it vibrates in the mouthpiece. Keep blowing and vibrating your lips so that sound gets out of the tuba. As tuba is a large brass, try blowing a raspberry into the mouthpiece. That's the kind of vibration you are looking at. Once you've got your buzz figured out, start your note by saying either "ta" or "da" into the mouthpiece, depending on how you want to articulate the note.  A properly maintained "embouchure" is critical to playing brass instruments. It's difficult to buzz your lips properly when you're first learning how to play. Don't puff out your cheeks. It's a waste of air that should be going into your horn, it looks silly, and you'll end up with very sore cheeks after only a brief period of playing. At any given position or configuration of keys pressed and open, you can play a number of notes, usually three. Some beginners have difficulty hitting a note right the first time, but don't worry too much while you're just getting started. Practice feeling where the different registers are.  Pinch your cheeks and your lips as you blow to control the amount of air that comes through your "buzz." You can raise or lower the pitch of the note in the same position, accordingly. Try associating how the note will sound, where the note is on the staff, what it feels like to play the note, and the fingering for it.  Many beginners only associate the note on the staff and the fingering for it, so they become confused...