The grand staff

Piano music joins a treble staff and a bass staff with one brace, and middle C sits in the gap between them.

Two staves, one instrument

A piano covers more than seven octaves, far too much for one staff. Piano music therefore uses the grand staff: a treble staff on top, a bass staff below, joined at the left edge by a vertical line and a curly brace. The brace tells you the two staves belong to one player and are read at the same time, the way you read two lines of a duet together. Harp and celesta music use the same arrangement, and organ music adds a third staff for the pedals.

Middle C belongs to both

Picture the two staves pushed together until there is only one line between them. That shared line would be middle C, and the eleven lines together would form one continuous ladder from G2 at the bottom to F5 at the top. In real music the staves are spread apart for clarity, so middle C appears as a ledger line either just below the treble staff or just above the bass staff. The choice usually shows which hand plays it: notes on the upper staff go to the right hand, notes on the lower staff to the left.

Notes near middle C can be written in either clef. D4 is the space under the treble staff or the space above the first ledger line over the bass staff. B3 is the space above the bass staff or the space under the middle-C ledger line in treble. When a melody crosses from one hand to the other, the writer moves it to the other staff at a convenient moment so that neither hand needs many ledger lines.

Why not draw one big staff of eleven lines? Five lines is about as many as the eye can take in at a glance, and an eleven-line staff would make every note a counting exercise. Splitting the range into two familiar groups of five, with middle C on an imaginary line between them, keeps both halves quick to read. Each hand also gets its own home: the right hand mostly lives around the treble staff and the left hand around the bass staff, and when a hand crosses over, the notes simply move to the other staff.

How to read two staves at once

Read the grand staff in columns, not one staff at a time. Notes stacked vertically, even across the gap, are played together. Beginners often find it easiest to read the bass note first, because it usually changes less often, and then add the treble. Keep two landmarks in mind at all times: the treble G line and the bass F line. Middle C sits exactly halfway between them, a fifth away from each: count G, F, E, D, C down from the treble G line, or F, G, A, B, C up from the bass F line.