Multiband - Orban OPTIMOD 5750 Operating Manual

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Orban 5750 Technical Manual Operation
The amount of bass boost will be highly dependent on the fundamental frequency of a given voice. If the
fundamental frequency is far above 100Hz, there will be little voice energy in the bottom band and little or no audio
bass boost can occur even if the gain of the bottom band is higher than the gain of its neighbor. As the fundamental
frequency moves lower, more of this energy leaks into the bottom band, and you hear more bass boost. If the
fundamental frequency is very low (a rarity), there will be enough energy in the bottom band to force significant
gain reduction, and you will hear less bass boost than if the fundamental frequency were a bit higher.
The 5750'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 algorithms to ensure low noise and distortion.
The 5750 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.
HF ENH ("High Frequency Enhancer") is a program-adaptive 6 dB/octave shelving equalizer with a 4 kHz turnover
frequency.
It constantly monitors the ratio between high frequency and broadband energy and adjusts the amount of
equalization in an attempt to make this ratio constant as the program material changes. It can therefore create a
bright, present sound without over-equalizing material that is already bright.

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