Omnia Audio Omnia 8x - Manual (Page 36)

Equalization Changes
Tailoring the shape of the overall audio spectrum can be done in three different sections:
1.
The relative drive settings in the multiband AGC menu. These controls set the drive levels of the multiband
AGC sections.
2. The settings of the multiband Mixer controls.
Both options will provide noticeable change in EQ. We suggest you use the first two listed options. In either case,
an EQ change is still followed by a dynamically controlled stage. Therefore any excessive EQ change can be
'undone' by the subsequent AGC.
The last option, adjusting the Mixer, is designed to provide a final minor trim to the spectrum. If you've noticed that
we calibrated these controls in 0.10 dB steps, then you know what we mean when we say these controls are for fine
trim! Since this stage is after all of the dynamic AGC and Limiting, a radical change in level in the Mixer will result
in additional and possibly excessive limiting of audio in that band. We suggest that changes implemented here be
limited to no more than about 1.0 dB. Naturally, the decrease in mix level can be done to any desired amount.
Thunder Bass
Omnia 8x has the power to shake the walls with low end! If your source material has it, Omnia 8x will put it in the
mix, and with muscle! Making changes to this characteristic is done using the following parameters, and for
maximum effectiveness, in the order listed:
1.
In the Enhance Menu, increase the amount of Deep Bass or Phat Bass boost.
2. Increase the drive to the LF Limiters with the appropriate controls in the Limiter XO screen.
3. Speed up the Release times of the LF Limiter sections.
When it comes to processing, moderation is the key! If all of the above steps are utilized in the pursuit of more bass,
then severe low frequency over-enhancement can occur. Excessive bass boost can produce the illusion that the
presence and high frequencies have been lost. They are still there, but are being acoustically masked by the lower
frequencies.
Generally, an increase in the Enhance Menu's Bass boost functions alone will provide more than sufficient
enhancement to the low end.
Reducing Codec Artifacts
Dynamics processing is an extremely useful tool that will reduce audible artifacts from lossy-compression codecs.
High frequencies tend to be the first perceptible annoyances, followed by that swishy-swirly water like sound that’s
quite common at lower bitrates. These artifacts can be reduced, and in some cases removed when the audio
processor is applied as a tool.
Generally, it’s understood that as codec bitrates are reduced, so is the audio bandwidth. Omnia 8x contains selctable
low pass filters in the Output section. Reducing the audio bandwidth through filtering will help. Additionally, the
upper band of processing can be reduced in the MIX section, which will allow that band to act as a dynamic
governor. Operating the HF Band in the slow release time will reduce HF density which improves intelligibility as
the encoder masking algorithm is not loaded as heavily with HF content.
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