Hd Crossfeed - Omnia .9 Installation & User Manual

FM MENU INTERMEDIATE MODE
Slope 2 has a higher cutoff frequency than Slope 1, offering more control over the mid-bass while creating a "dirtier" bass
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sound with more harmonics. On certain formats, or when listening on a smaller radio, this may be a desirable effect.
Slope 1+2 is simply Slope 1 followed by Slope 2. Most of the low bass will be controlled by Slope 1 and stay nice and clean,
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while the remaining bass will be taken care of by Slope 2 without affecting the low bass. If you are using heavier overall
processing, this option will give you the cleanest sound.
The Bass Clipper Threshold control sets the threshold of the Bass Clipper. Raising the threshold (moving the slider to
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the left) reduces the amount of clipping performed by the Bass Clipper, but place a greater burden on the Final Clipper.
Conversely, lowering the threshold (moving the slider to the right) will yield more bass clipping, which takes some of
the load off the Final Clipper, but may result in low frequency distortion if set too low.

HD Crossfeed

The HD-Crossfeed menu provides you access to drive and filter controls relating to the shared processing paths in Omnia.9.
Crossfeed architecture allows FM and HD or AM and HD paths to share a common processing path, up to the point where
those paths must diverge. For example, if FM and HD paths share early stage processes such as input conditioning, WB AGC,
Undo, and insert points (for watermarking, etc.) they benefit in terms of blending and resource use. But since the FM path
must go to a clipper stage while HD goes to a final limiter, paths must split at latter stages in the chain. HD Crossfeed is the last
point before that split.
The HD Limiter Meters control enables / disables the HD Limiter Meter in the FM processing meter section.
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The HD Limiter Drive control allows you to increase or decrease the drive to the look-ahead limiter used for the
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crossfeed, so that you can achieve the cleanest possible sound through low bit-rate coded channels (having some
transients will help the codec!), as well as balance transitions that may occur in the transmission path downstream (such
as HD/FM blend).
The HD Treble control allows you to reduce high frequency content in the crossfeed. This may be necessary since the FM
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pre-emphasis clipper stage will inevitably reduce high frequency content on the FM path, which is often compensated
for by increasing brightness in the processing preset for the FM path. Since crossfeed means that this same preset is used
for HD which does not have the corresponding high frequency limitation, reducing treble will go a long way towards
preventing the fully digital HD path being perceived as overly bright or harsh.
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