This video describes how to enable Noise Assist, the noise reduction plugin for the MixPre series recorders.
Note that in the menu, you'll have to assign which input you'd like the plugin to act upon. It can only noise reduce ONE input, so choose wisely!
It can also noise reduce the entire LR mix, if you'd like that option, although better results are obtained by focusing on the key channel you're recording. That may be a boom mic, or a Lav, etc.
