Sharps, flats and naturals that do not appear in a key signature.
Two notes played together, usually in one hand but sometimes in both, whose distance is the interval of a 6th of any quality.
D.S. al Coda
An indication instructing the player to go back to the "S" symbol, then jump to the coda when "al coda" or "to coda" is reached.
Notes whose lengths are equal to one-fourth the value of a whole note.