Italian voice actor Carlo Bononi was the voice of all of the characters on Pingu. A trained clown by trade, he used a theater technique called grammelot, which consists of "speaking" in a mix of babbled gibberish noises. He improvised all the voices live and unscripted.

The series is truly joyful, even if you know neither the song nor the drummer. This one in particular is phenomenal: www.youtube.com/watch?v=HMBR...