As a musician, it can be difficult incorporating new playing techniques. Slow, methodical practice with a focus on detail is necessary to be successful. Vibrato is the term used for adding vibration to tones of any instrument. For string instruments such as violin or cello, players rock their finger on the string to create the vibration. For wind instruments, such as flute, producing vibration requires manipulating the air column through controlled muscle movement. The benefit to vibrato is a richer sound that adds an extra element of enjoyment to the music.
Select a note on your instrument that is comfortable to play. Blow into the instrument and sustain the sound as long as you are able. While doing this, keep your throat relaxed and open to allow the air to pass without hindrance.
With the metronome at a slow tempo, play the sustained tone while dividing the beat with diaphragm pushes. Practice adding two, three or four diaphragm pushes for each beat of the metronome to further increase your muscle control and strength.