Orban OPTIMOD-FM 8600Si, Руководство по эксплуатации

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OPTIMOD-FM DIGITAL OPERATION
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that they will curl the vinyl off car dashboards. We hope that the record industry will
come to its senses when it hears the consequences of these practices on the air.
If the waveforms on a given CD are noticeably clipped, it may be possible to improve
the sound by using de-clipping software
1 , which attempts to reconstruct the clipped-
off sections of the waveform by extrapolating the clipped-off part of the waveform
from audio that surrounds it. Beyond this, our best advice regarding 8600Si process-
ing is to use slow multiband release times and considerable band 4
Æ
band 5 cou-
pling, which will not further exaggerate distortion already on the CD.
It is also wise to use a mic processor on talent microphones so that the audio density
of speech material will more closely match that of the music. If you do not use a mic
processor, you can alternatively set up the 8600Si’s speech-mode processing parame-
ters to create more density than do the music-mode parameters. However, the ex-
ternal mic processor’s performance will be more predictable because the 8600Si will
detect speech with substantial background music or effects as “music” and will not
apply “speech” mode processing to this material.
About the 8600Si’s Signal Processing Features
Dual-Mono Architecture
The 8600Si implements full dual-mono architecture in both the AGC and the multi-
band compressor sections. You can couple each band in both the AGC and multi-
band compressors to a variable extent—anywhere from perfect stereo coupling to
completely uncoupled operation. The coupling control determines the maximum
amount of gain imbalance permitted between the left and right channels in a given
band, and therefore the amount of stereo image shift permitted in each frequency
band.
Although the processing is dual-mono, you cannot adjust setup controls independ-
ently on the left and right channels—we assumed that the 8600Si would always
process stereo program material.
Signal Flow
The signal flows through the 8600Si through the following blocks:
•
Input Conditioning, including sample rate conversion, defeatable 30 Hz highpass
filtering, and defeatable phase rotation
•
Stereo Enhancement
1
As of this writing, two audio restoration programs that offer this feature are Dia-
mond Cut DC8 and iZotope Rx.