Adjusting The Clippers - Omnia 6FM Installation And Operation Manual

Broadcast audio processor
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Clippers (Clip)
Clipper Submenu
Bass Clip Threshold: Limiter bands 1 & 2 have their own clipper and time-aligned low-pass filter in order
to reduce IM distortion in the main clipper. The Bass Clip Threshold control sets the threshold of the bass
clipper referred to the clip level of the main clipper. A higher threshold (counter-clockwise) will reduce the
amount of bass clipped by the bass clipper but cause a corresponding increase in the amount of bass clipped
by the main clipper. Conversely, a lower threshold (clockwise) will reduce the amount of bass sent to the
main clipper but increase the amount of activity in the bass clipper. Too much clipping by the bass clipper
can soften bass 'punch'. It may also be heard as a "rattling" sound in the bass. Fine tuning of the bass
clipper drive level is also possible by adjusting the band 1&2 controls in the Final Mixer as these feed the
input of the bass clipper.
Clipper Drive: Here is where the Omnia6-fm's loudness versus quality advantage is most evident! The
main clipper is a very powerful algorithm, is highly oversampled, and is fully anti-aliased. This clipper
control's adjustment range is +/-6 dB, in 0.1dB steps. It is advisable to make minor changes, primarily as
the 'loudness fine tuner'. Be careful; there is a lot of available power here!
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 compostie 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
Omnia 6 Use and Installation Guide – Version 1.00a
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