If you have ever been annoyed by your PowerBook's or MacBook Pro's backlit keyboard then Lab Tick is the solution for you. The application will solve your problem when you can not control your backlit keyboard, and simply have to deal with the behaviour dictated by the ambient light sensor, which sometimes does not work really well.
Train to sing on key. It listens while you sing and displays the pitch of your voice on a graph, in real time.
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