Tape-head azimuth errors
When you retrieve the sound from a stereo tape that has been either recorded or
replayed off-azimuth, there are two sources of audible degradation.
Q
The first effect is caused by the distance – in the direction of tape travel –
between the centres of the tape heads. This is the primary timing
difference, and it is this that
CEDAR
’s processes detect and correct.
Q
The second effect is the smearing caused by the length of tape covered –
again in the direction of tape travel – by the offset head. In general terms,
the head will then ‘average’ the signal lying underneath it at any point rather
than measuring the instantaneous value. The degradation caused by this will
be smaller than that caused by the primary error, and the effect will therefore
be less significant. However, it will lead to a loss of high-frequency content,
and to a small reduction in dynamic content.
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Summary of Contents for AZX+
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Page 7: ...PART 1 Operations manual ...
Page 12: ...PAGE 6 CEDAR BRX debuzzer 1 2 3 4 10 11 12 13 14 CEDAR AZX azimuth corrector 1 2 5 6 7 8 9 14 ...
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Page 15: ...The BRX debuzzer ...
Page 19: ...The AZX azimuth corrector ...
Page 25: ...PART 2 An introduction to audio restoration ...
Page 27: ...PAGE 21 Figure 2 Figure 3 Figure 1 ...
Page 29: ...PAGE 23 Figure 5 Figure 4 ...
Page 31: ...PAGE 25 Figure 2 Figure 3 Figure 1 Figure 4 ...
Page 33: ...PAGE 27 Figure 6 Figure 5 ...
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