I was one of those people who have way too much vibrato.
I only had too much vibrato because I had a lot of problems going on at the same time.
But it did allow me to experience the vibrato.
Let's look at what's going on physically with vibrato. And then with that understanding we will be able to look at singing with the perfect amount.
Vibrato is air coming through while your vocal cords are oscillating.
When I'm able to allow that oscillation, the vibrato comes through and you can hear the wavering. Then I can take the oscillation away again.
If you add a bit more tension to your vocal chords, they will stop oscillating and the vibrato goes away.
Let go of the tension and it allows the vibrato to come through.
In the video, I demonstrate with an exercise at 1:30. You'll hear that I come into the exercise not allowing the vibrato to happen. Then I let go of the tension, and the vibrato comes through. See if you can hear it.
(The video below will start that the correct place for the demonstration)
If you haven't been able to let the vibrato come through, it means you've been a little too tight. So allow it to relax a little bit.
In the beginning, you can use your body a little bit to get the vibrato going. For example, you've probably seen singers moving their jaw up and down.
And that's okay to get started, but we don't want to depend on that.
We want to allow the relaxation to let vibrato happen when we want it. Vibrato isn't a way of singing all the time—it's just an added effect that you can use that will add a lot of personality to your singing.
So practice reducing the tension on your chords like I demonstrated in the video to get your vibrato going.
And then increase the tension when you want it to stop.
With time you will be able to control your vibrato, and turn it on and off as you please.