<< It looks like BIAB has first created the files (the lower set) and then it has made copies of those files to load on the Utility tracks. >>

Noel is correct. To not create the copies, Unclick 'Preserve WAV files' button in the Stems Splitter.

Another tip is it's an unnecessary step to import the audio file first when opening a new project. Type - stems - into any bar/measure box. Then use the Stems Splitter Choose button to select and load the audio file. This initiates the import and allows the user to set all of the Stems Splitter settings. When the stems import is complete, select the ACW button to open the Audio Track (Stems Master Track) to analyze the audio file and sync it to the BIAB Mixer. The Master Track is automatically muted and the Styles are disabled so you will hear the stems but the Stems Splitter will analyze the stereo Master.

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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.