The bass staff is the lower of the two staves in the grand staff. In addition to its position, it is also designated by the bass clef, which is placed at the very left in each set of the five lines of this staff on sheet music. A note placed on the top line of the five lines represents the first A below middle C (which is the first ledger line above this staff), designated A3 and MIDI 57, and a note on the bottom line represents the second G below middle C, designated G2 and MIDI 43.