With the MDX5.1 you get a high-resolution dynamics processor for
multichannel signals. It presents a sophisticated angle to dynamic
range control, and it is an alternative to traditional compression
and limiting techniques.
MDX5.1 lets you bring up low-level details, rather than boosting everything, which makes it necessary for you to limit the transient peaks afterwards.
The transfer function offered is ideal for level translation purposes, for instance for broadcast station ingest, or for converting between theatrical and domestic listening conditions.
You can even apply low-level lift to specific channels individually in one, two or three frequency bands.