Marc. Marcato. In a marked manner, emphasised.

M.M. Maelzel's metronome.

M.M.

Ott., Ova, 8va=Ottava. An octave—as 8va alta=ottava alta, (to be played) an octave higher; 8va bas. = ottava bassa, an octave lower.

p. Piano. Softly.

P.F. or pf. Piano-forte. Soft, then loud.

pp. Pianissimo. Very soft.

ppp. Pianississimo. As softly as possible.