Using the Omnia9sg with the Omnia.11

Updated 1 month ago by Mark Manolio

Scope

This document applies to the use of an Omnia.9sg and Omnia.11 in a split configuration.

Description

The Omnia.9sg can be a great complement to the Omnia.11 in more ways than one!

A typical scenario would be to use them in a "split system" configuration where the Omnia.11 is at the studio, and the Omnia.9sg is at the transmitter site. We will cover this configuration here.

The advantage of the Omnia.9sg, in this configuration, over other conventional stereo generators is that it contains the full psycho-acoustic distortion-masked clipper from the Omnia.9. This allows the 9sg to do the FM pre-emphasis and final limiting/clipping instead of the Omnia.11.

You'll also have the 9sg's (optional) local backup processor, 2 MPX inputs, and all of the analysis tools available. 👍

Setup

Omnia.11 must be running GForce on software v3.6 or higher.
  1. In the Omnia 11 set the output you will be using for the send to the 9SG to "PP" (Patch Point).

This will send the processed audio taken after the 6-Band limiter/bass clipper but before the pre-emphasis and main clipper. In the example shown here, we will be using the Omnia.11's AES 1 output (Output menu / Basic tab).

  1. In the Input menu, Advanced tab, make sure that "Patch Send" is set to "AES1". The other switches there should be "off":
If you have been using the patch point previously for a Voltair/watermark encoder, fear not, you will be able to achieve the same effect by placing the Voltair and/or watermark encoders between the Omnia 11 and 9SG.

Three controls will affect the PP output level:

  • AES1 Output 1 Level
  • Patch Out Level (under Input /Advanced)
  • Clipper Drive" control.
  1. Since most of the factory presets have the "Patch Out Level" defaulted to -1.0dB, we will leave it there.
  2. The "AES1 Output 1 Level" should be set to -12.0dB. (to leave enough headroom for some peaks and the clipper drive adjustment). The Clipper Drive control will perform it's labeled function!
  3. Enable pre-emphasis on the Omnia.9sg. Shown here;
The Omnia.9SG does not have a clipper drive control, so its "Input Gain" control sets the clipping level.

In our example, the Omnia.11's PP output is set for -12.0 dBFS, and the Omnia.9sg's Input Gain set to 16.5dB. Now, the Omnia.9sg's Input Gain and the Omnia.11's Clipper Drive will determine the amount of clipping and the loudness vs. distortion tradeoff. I would recommend using the Omnia.9sg's Input Gain control to set the coarse amount of clipper drive and the Omnia.11's Clipper Drive control for fine adjustment.

In the above screenshot from the Omnia.9sg NfRemote application, the Input Gain set to 16.5dB. The Clipper Meters (under Instrumentation/Clipper Meters) and Pre Final Meters ( under Meters/ Pre-Final Meters) showing at the top.

The Pre-Final meter's peak bar indicators will bounce up above "0" approximately by the amount of clipping. This is normal and there is plenty of headroom at these settings.

Here are suggested settings for the Omnia.9sg's bass clipper for use along with the bass clipper in the Omnia.11:

Final thoughts

This clipper operates in the composite domain and loves peaks.😀 If you are using reasonably heavy 6-Band limiting in the Omnia 11, you may be able to back-off some of that Limiter Drive and perhaps even raise the limiter thresholds a bit to get a more open, yet still loud sound. As with any clipper, always use the least amount of clipping you can for the loudness you need.

Let us know how we can help

If you have further questions on this topic or have ideas about how we can improve this document, please contact us.


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