The G clef, also called the treble clef, is the familiar symbol that resembles an elaborate ampersand and is often used as a symbol representing music in general. It is placed so that the midpoint of the large loop near its bottom is on the G above middle-C (G4), which is usually the second line from the bottom on any stave on which it is used. This clef is used for most of the many instruments that do not produce predominantly low pitches, such as the flute, oboe and violin. In the case of piano sheet music, it is generally placed on the upper of the two staves, while the bass clef, which resembles a large, reversed letter C, is usually used on the lower of the two staves.