Article: When playing, make sure to hold your right elbow flush against your side. This will help prevent arm, shoulder, and neck strain, as well as give you greater control over your hand techniques. To change from one note to another, slide the harmonica right or left in your mouth. Most harmonicas will have between 10 and 16 notes to create sound, though specialty harps may have more. Most consumer harmonicas are locked to one key with note variations made by changing how you blow. Play the harmonica with your hands fully closed to create low, bass-heavy notes. The tighter your hands are, the bassier the note will sound. This technique is used heavily in blues music. To play higher, brighter-sounding notes, open your hands to let more air escape. Instead of sad, muted tones, this will give you the bright, bouncy ones used throughout folk music. To create the classic warbling sound harmonicas are known for, move your right hand to create a small passage where air can escape. When you rapidly open and close this passage, you will create wah wah sounds. Some areas to open your hand include:  Behind the harmonica, done by slightly twisting your right hand. On top of the harmonica, done by extending the fingers on your right hand. Below the harmonica, done by bottoming out your right wrist.
What is a summary of what this article is about?
Hold your right elbow in. Slide your harmonica to change notes. Keep your hands closed to create low tones. Open your hands to create high tones. Open and close a section of your hand to create wah wahs.