The sopranino saxophone is the second-smallest member of the saxophone family. It is tuned in the key of E♭, and sounds an octave higher than the alto saxophone. A sopranino in F was also described in
Top to bottom: a curved E♭ sopranino saxophone, a straight E♭ sopranino saxophone, a C soprano saxophone, and a B♭ soprano saxophone
The mezzo-soprano saxophone, sometimes called the F alto saxophone, is an instrument in the saxophone family. It is in the key of F, pitched one whole tone above the alto saxophone in E♭. Its size and
Mezzo-soprano (left) and alto (right) saxophones.