Most woodwind instruments have one major scale whose execution involves lifting the fingers more or less sequentially from the bottom to top. This scale is usually the one notated as a C scale (from C to C, with no sharps or flats) for that instrument. The note written as C sounds as the note of the instrument's transposition: on an E alto saxophone, that note sounds as a concert E, while on an A clarinet, that note sounds as a concert A. Clarinets are one exception, in that they actually have two different scales in the first and second registers, nominally an F scale and a C scale, but treated by the performer as sounding "at pitch" for a C clarinet. The bassoon is another exception; it is not a transposing instrument, yet its "home" scale is F (like the low register of the C clarinet).