Orban OPTIMOD-FM 8700, Operating Manual

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OPERATION ORBAN MODEL 8700i
The AGC has its own silence-gating detector whose threshold can be set inde-
pendently of the silence gating applied to the multiband compressor.
Xponential Loudness™: The Xponential Loudness algorithm searches compressed
music in real-time looking for lost music details. It then intelligently corrects wave-
form deficiencies and restores the harmonic impact of the original recording while
bringing out otherwise inaudible details. Based on music mastering algorithms de-
veloped by Orban engineers, Xponential Loudness supports all existing music file
formats.
Equalization: The 8700i has steep-slope bass shelving equalizer and three bands of
fully parametric bell-shaped EQ.
You can set the slope of the bass shelving EQ to 6, 12, or 18 dB/octave and adjust the
shelving frequency.
The 8700i’s bass, midrange, and high frequency parametric equalizers have curves
that were modeled on the curves of Orban’s classic analog parametrics (like the
622B), using a sophisticated, proprietary optimization program. The curves are
matched to better than 0.15 dB. This means that their sound is very close to the
sound of an Orban analog parametric. They also use very high quality filter algo-
rithms to ensure low noise and distortion.
The 8700i HF Enhancer is a program-controlled HF shelving equalizer. It intelligently
and continuously analyzes the ratio between broadband and HF energy in the input
program material and can equalize excessively dull material without over-enhancing
bright material. It interacts synergistically with the five-band compressor to produce
sound that is bright and present without being excessively shrill.
Subharmonic Synthesizer: The subharmonic synthesizer generates subharmonics of
fundamental frequencies in the 50-90 Hz range. The subharmonics are one octave
below the frequencies from which they are generated (i.e., 25 to 45 Hz) and track
the levels of their generating frequencies.
Figure 3-3: Xponential Loudness Block Diagram