Make-up Gain defines an amount of gain applied after the HDR processing. This gain does not influence the HDR dynamics, in the way that adjustments made with standard volume sliders do. Make-up Gain can be used to offset sound levels relative to the HDR window. It can also be used to adjust loudness normalization.
Using Make-Up Gain to offset volume levels for a Sound Object
The ability to control the volume of a source without affecting the HDR response is a powerful tool that gives precise control over the mix. The abstraction of volume values becomes a natural process as the mix is iterated during production. Once volumes for sounds are set within the HDR system, this additional volume control ensures that the mix can be fine-tuned without disturbing the overall composition.