Moondog also invented several musical instruments, including a small triangular-shaped harp known as the "oo", another which he named the "ooo-ya-tsu", and a triangular stringed instrument played with a bow that he called the "hüs" (after the Norwegian, "hus", meaning "house"). Perhaps his best known creation is the "trimba", a triangular percussion instrument that the composer invented in the late 40s. The original Trimba is still played today by Moondog's friend Stefan Lakatos, a Swedish percussionist, to whom Moondog also explained the methods for building such an instrument.
