ISBD(NBM) - IFLA
ISBD(NBM) - IFLA
ISBD(NBM) - IFLA
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Analogue disc<br />
Specification 78 rpm Other<br />
speeds<br />
Digital<br />
disc<br />
Reel Cassette Cartridge<br />
Speed A A 1.4 m/s. A A: 4.76 cm/s. A: 9.5 cm/s.<br />
Recording method A: electric A: electric N/A N/A N/A N/A<br />
Groove direction A: lateral A: lateral N/A N/A N/A N/A<br />
Groove size A: coarse A: micro N/A N/A N/A N/A<br />
No. of tracks N/A N/A N/A A A A:S<br />
Track configuration N/A N/A N/A A: alternate N/A N/A<br />
No. of sound channels A: mono A A A A A: stereo<br />
Equalization system N/A N/A N/A A A A: 50µs<br />
Noise reduction system N/A N/A N/A A A A<br />
5.2.8.1 The playing speed of the item is given in appropriate terms.<br />
e.g.<br />
. – 1 sound disc : 33 1 /3 rpm<br />
. – 1 sound reel (100 min.) : 19 cm/s.<br />
. – 2 videodiscs (24 min.) : 1500 rpm<br />
5.2.8.2 For sound discs the recording method, groove direction and groove size are given if<br />
known.<br />
e.g.<br />
. – 1 sound disc : 78 rpm, vertical<br />
. – 1 sound disc : 33 1 /3 rpm, coarse<br />
5.2.8.3 For items employing magnetic tape, the number of tape tracks is given.<br />
e.g.<br />
. – 1 sound reel (100 min.) : 19 cm/s., 2 track<br />
For sound reels recorded on four or more tracks, the track configuration is specified.<br />
systems<br />
e.g.<br />
. – 1 sound reel (90 min.) : 19 cm/s., 4 track, adjacent<br />
5.2.8.4 The number of sound channels is given.<br />
e.g.<br />
. – 1 sound disc : 33 1 /3 rpm, mono<br />
. – 1 sound reel (50 min.) : 38 cm/s., 2 track, stereo<br />
5.2.8.5 For items employing magnetic tape, the equalization and noise reduction systems<br />
employed may be given if known.<br />
e.g.<br />
. – 1 sound reel (45 min.) : 19 cm/s., 4 track, NAB<br />
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