For the same reason , a stop that sounds an octave higher is at 4 ′ pitch , and one that sounds two octaves higher is at 2 ′ pitch .
This is the normal pitch : the note will sound as it is written , e.g. when playing Middle C the sound will be Middle C . A 4 foot stop will sound an octave higher than written , a 2 foot stop will be two octaves higher .