2/4 3/4 4/4 and 3/8 are the simple time signatures.

Musical beat symbols are notes, rests, and time signatures. These are used on sheet music to show the person playing the instrument how to play the song.

Dave Brubeck is a jazz pianist and musical composer. Some of his hits were, "In Your Own Sweet Way," and "The Duke." His music's unusual timing signatures were a characteristic of his improvisational skills.

if it is for a cause its a petition

List of musical instruments