The treble clef reads notes above Middle C; the bass clef reads notes below Middle C using the same ledger-line counting method
Musical notation uses two main clefs to cover the full keyboard range. The treble clef (G clef) centers on notes from Middle C upward; the bass clef (F clef) covers notes below Middle C. Both use Middle C as a common reference point — in treble, Middle C is on a ledger line below the staff; in bass, Middle C is on a ledger line above the staff. Notes on the bass clef are calculated by counting down from Middle C, using the musical alphabet in reverse. Knowing the F line (the line the bass clef symbol circles) provides an orientation shortcut. In DAW score editors, bass and treble staves are usually shown together as a grand staff.
Examples
Middle C: treble clef = first ledger line below staff; bass clef = first ledger line above staff. Piano grand staff: treble for right hand, bass for left hand.
Assessment
On a bass clef staff, identify the pitch on the second line from the top. Explain why Middle C appears differently on treble vs. bass clef.