piano roll

n. A roll of paper containing perforations corresponding to the notes of a musical composition, used in operating a player piano.

n (Music, other) a perforated roll of paper actuating the playing mechanism of a Pianola. Also called: music roll

pian′o roll`

n. a roll of paper containing perforations such that air passing through them actuates the keys of a player piano. [1925–30]

The perforated roll of paper that controlled the hammers of a Player piano.

单词	piano roll
释义	piano roll piano roll n. A roll of paper containing perforations corresponding to the notes of a musical composition, used in operating a player piano. piano roll n (Music, other) a perforated roll of paper actuating the playing mechanism of a Pianola. Also called: music roll pian′o roll` n. a roll of paper containing perforations such that air passing through them actuates the keys of a player piano. [1925–30] Piano roll The perforated roll of paper that controlled the hammers of a Player piano.
随便看	ischemic zone wall thickening ischesis ischi- ischia ischiac ischiadic ischiadic nerve ischiadic passion ischiadic plexus ischiadic spine ischiadicus ischia, italy ischial ischial arch, ischiatic arch ischial bone ischial bursa ischial bursitis ischial callosity ischial fold of broca and gery ischialgia ischial-pubic flap ischial ramus ischial spine ischial tuberosity ischial urethrostomy