Welcome to World Voice Day


Komm lieber Mai

Overtonesinger Anna-Maria Hefele sings with her beautiful voice and then sings the same melody with overtones derived from different drones: Spectacular!

View the movie clip»


Can teacher’s voice quality affect children’s learning?

The answer is yes – experimental studies show that children are affected in different ways depending on their cognitive capacities, gender and  possible hearing impraiment.

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Download vowel synthesiser

Enjoy meeting the MADDE vowel synthesiser! Experience changes of vowel and  voice quality,  pitch, vibrato characteristics etc as you change the parameters….Read more»


Check the two movies of the vocal tract in profile, recorded by  MR technique. One shows a famous baritone singing an aria and the other a male speaker reading a Swedish story. Read more»