Clipper Silk: This control adjusts the texture of the main clipper when the clipper is handling significant mid and
upper midrange program material such as solo electric guitar, etc. We've brought out a hidden control from the
distortion-canceling algorithm to allow you to make subtle tradeoffs in how the final clipper texture sounds. Higher
numbered settings (clockwise) soften (or silken) the sound of the clipping at higher frequencies, with only a slight
reduction in brightness on some material. The sound of clipping low frequency material (<2Khz) is largely
unaffected.
Composite Drive: This controls the drive to the DSP-based composite clipper. A setting of 0.0 is the same as the
clipper being “off “. This clipper operates on the entire baseband signal up to 53kHz, except for the 19kHz pilot. No
matter how hard you drive the composite clipper, you cannot clip the stereo pilot. Embedded within the composite
clipper is a 53Khz phase linear low pass filter for SCA protection, as well as a wide and deep pilot notch filter.
These filters combine to remove clipping harmonics and prevent them from affecting the stereo pilot and SCA
regions.
Look Ahead Limiter (HD Mode Only)
Look Ahead Limiter Submenu
Omnia-6EX employs a Look Ahead limiter to provide absolute precision peak control for the HD Digital Channel.
This limiter has been designed to minimize processing side-affects like IMD, which are usually associated with
limiters of this type. Using an innovative design that cancels intermodulation products before they develop allows
this limiter to sound extremely transparent. The limiting function is derived using numerous control signals that
monitor one another. Customer access is provided to these signals so that the texture of the sound of this limiter can
be altered to taste. (These parameters will be described soon!)
This type of peak controller is used instead of a clipper because it does not generate the same high levels of THD as
a Clipper does. THD causes added difficulties in a coded audio system because the harmonics generated from the
clipping action create added artifacts and workload in the encoder. These are especially annoying at high
frequencies.
On the other hand, while a Look Ahead limiter yields extremely low levels of THD, it will create some IMD
component, but this still allows the audio coder to operate with minimal sonic artifacts.
Omnia-6ex Use and Operation Manual – V: 1.10
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