Pink Trombone is an online voice synthesizer with a difference

Neil Thapen's Pink Trombone is a voice simulator: instead of telling it what to say, you individually move the soft and fleshy parts of the mouth, tongue and throat. There's a lot of fun to be had moving around the circular purple tongue control and the bottom lip and hearing the machine sing.

Spotted via Bennett Foddy, which made me think there should be a version controlled with the Q W O P letters, named "Qwopera."