The fastest ways I know of is to Save as a Performance File from the Track Actions menu for a single track and if you want to save without playing for an entire mix, use the Master Track use Render Song to Audio Track and the mix that's currently in the BIAB 24 channel mixer will render almost immediately to the Audio Track.

Saving as an Artist Performance File, saves the file, names the file, changes the label and color (orange), freezes the file and can be stretched, slower or faster tempo and can be undone. It's very fast and very powerful tool. One of my favorites. An Artist Performance File can save a single track, a mix of tracks or the entire song with the user choosing the settings. The Artist Performance File can save in any format BIAB recognizes and they can be combined into a single mix.

The Master Mix, Mix flat, dry, and Center, setting a SGU file as a mix template are available in all views from the Master Radio Button, Tracks, Chord View, Piano Roll, and Notation even if the Mixer is hidden.

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BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.