What is the vibrato switch for on a casio keyboard?

Question: What is the vibrato switch for on a casio keyboard!?

I just got a old casiotone keyboard with a 4 vibrato features (off, slow-deep, fast-deep, fast-slight)!. I cant hear a difference when playing with it off or on!. Could someone tell me what vibrato does!? Maybe it's broke or i would need to plug into a amp before hearing the difference!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Hi

To notice the difference, try it with a guitar or piano sound or wind instrument!. You will hear a shaky -like like a car that can't start when you try to crank it!.
that is the best way to explain the effect of the Vibrato!.Www@QuestionHome@Com

If it is old yes maybe it is not working!. Try an amp!. You should notice quite a difference in pitch when it is on:

Vibrato is a musical effect, produced in singing and on musical instruments by a regular pulsating change of pitch, and is used to add expression and vocal-like qualities to instrumental music!. Vibrato can be characterized by the amount of pitch variation ("depth of vibrato") and speed with which the pitch is varied ("speed of vibrato")!.Www@QuestionHome@Com