Omnia Audio Omnia A/XE - Manual (Page 63)

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 eliminated, 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 A/XE contains selectable 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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