OPTIMOD-FM DIGITAL
OPERATION
3-5
tial. To modify your air sound effectively, you must be able to hear the results of
your adjustments. In too many stations, the best monitor is significantly inferior to
the receivers found in many listeners’ homes!
At this writing, there has been a very disturbing trend in CD mastering to apply lev-
els of audio processing to CDs formerly only used by “aggressively-processed” radio
stations. These CDs are audibly distorted (sometimes blatantly so) before any further
OPTIMOD processing. The result of 8300 processing can be to exaggerate this distor-
tion and make these recordings noticeably unpleasant to listen to over the air.
There is very little that a radio station can do with these CDs other than to use con-
servative 8300 presets, which will cause loudness loss that may be undesired in com-
petitive markets. There is a myth in the record industry that applying “radio-style”
processing to CDs in mastering will cause them to be louder or will reduce the audi-
ble effects of on-air processing. In fact, the opposite is true: these CDs will not be
louder on air, but they will be audibly distorted and unpleasant to listen to, lacking
punch and clarity.
Another unfortunate trend is the tendency to put so much high frequency energy
on the CDs that this energy cannot possibly survive the FM pre-emphasis / de-
emphasis process. Although the 8300 loses less high frequency energy than any pre-
vious Orban processor (due to improvements in high frequency limiting and clipping
technology), it is nevertheless no match for CDs that are mastered so bright that
they will curl the vinyl off car dashboards.
We hope that the record industry will come to its senses when it hears the conse-
quences of these practices on the air.
About the 8300’s Signal Processing Features
Signal Flow
The signal flows through the 8300 through the following blocks (see page 6-62):
Input Conditioning
, including sample rate conversion, defeatable 30Hz high-
pass filtering, and defeatable phase rotation
Stereo Enhancement
Two-Band Gated AGC
, with target-zone window gating and silence gating
Equalization
, including high-frequency enhancement
Multiband Compression
with embedded HF clipping and additional HF limiter
HD Processing
, which runs in parallel with the remaining blocks below
“
Intelligent” Clipping
with distortion control, distortion cancellation, and
anti-aliasing
Summary of Contents for 8300J
Page 1: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
Page 7: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
Page 24: ......
Page 94: ...2 46 INSTALLATION ORBAN MODEL 8300 This page intentionally left blank...
Page 190: ......
Page 204: ......
Page 246: ......
Page 247: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 29...
Page 254: ...6 36 TECHNICAL DATA ORBAN MODEL 8300 CPU Module...
Page 260: ...6 42 TECHNICAL DATA ORBAN MODEL 8300 8300 RS232 BOARD PARTS LOCATOR...
Page 262: ...6 44 TECHNICAL DATA ORBAN MODEL 8300 8300 POWER SUPPLY PARTS LOCATOR...
Page 264: ...6 46 TECHNICAL DATA ORBAN MODEL 8300 8300 I O BOARD PARTS LOCATOR...
Page 270: ...6 52 TECHNICAL DATA ORBAN MODEL 8300 DSP BOARD PARTS LOCATOR DRAWING 32170 000 14...
Page 278: ...6 60 TECHNICAL DATA ORBAN MODEL 8300 8300 DISPLAY BOARD PARTS LOCATOR...
Page 279: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 61 DISPLAY BOARD...