 In this instance, middle C is centered between the two staves, and it can be written on the first ledger line below the upper staff or the first ledger line above the lower staff.Very rarely, a centered line with a small alto clef is written, and usually used to indicate that B, C, or D on the line can be played with either hand (ledger lines are not used from a center alto as this creates confusion).When playing the piano or harp, the upper staff is normally played with the right hand and the lower staff with the left hand.