UNIMARC: Sound recordings: Speed
1 ⅞ in. per second
k
Speed of sound recording tapes of 1 ⅞ inches per second.
1 in. per second (120 rpm)
h
Speed of sound recording cylinders of 1 inch per second or 120 revolutions per minute.
1.4 m. per second
g
Speed of sound recording discs and compact discs of 1.4 metres per second.
15 in. per second
o
Speed of sound recording tapes of 15 inches per second.
15/16 in. per second
l
Speed of sound recording tapes of 15/16 inches per second.
16 ⅔ rpm
a
Speed of sound recording discs of 16 ⅔ revolutions per minute.
160 rpm
i
Speed of sound recording cylinders of 160 revolutions per minute.
3 ¾ in. per second
m
Speed of sound recording tapes of 3 ¾ inches per second.
30 in. per second
p
Speed of sound recording tapes of 30 inches per second.
33 ⅓ rpm
b
Speed of sound recording discs of 33 ⅓ revolutions per minute.
4/10 in. per second
r
Speed of sound recording tapes of 4/10 inches per second.
45 rpm
c
Speed of sound recording discs of 45 revolutions per minute.
7 ½ in. per second
n
Speed of sound recording tapes of 7 ½ inches per second.
78 rpm
d
Speed of sound recording discs of 78 revolutions per minute.
8 rpm
e
Speed of sound recording discs of 8 revolutions per minute.
8/10 in. per second
q
Speed of sound recording tapes of 8/10 inches per second.
not applicable
x
other
z
For example, non-standardized speed for microgrooves before 1906.
unknown
u
Published