jQuery How to make an karaoke effect on text?

Does anyone know how I can make a karaoke effect with jQuery, on text? It's the input of a user and will only consist of one word. The user adds some input, and when you click add, the input adds to a output div. The effect should appear on the output. Its only the effect.

jsfiddle.net/cx5jZ

My question to you is; How do I do this开发者_运维问答? If yes, how can I make the user adjust the speed of the transition?

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I made this up: http://jsfiddle.net/bPGZT/.

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I made a more complex example based on pimvdb's, hope someone find it usefull :D

jQuery Karaoke

cheers!