Moondog's music took its inspiration from street sounds, such as the subway or a foghorn. It tended to be relatively simple but characterized by what he called "snaketime" and described as "a slithery rhythm, in times that are not ordinary.
In a search for new sounds, 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 (perhaps his best known) 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.
