It's not user error. BIAB requires a two bar count in and recorded audio normally hasn't been recorded with two bars of silence. This means that imported or opened audio into BIAB must have Bar 1 set.

The stem splitter uses the Audio Track for processing stems. BIAB aligns the split stem tracks with the Master File on the Audio Track which that track also aligns with the Chord Sheet and BIAB Styles. The Stem Splitter process automatically aligns the stems tracks that are placed on Utility Tracks with the Master Track on the Audio Track as part of the stem splitting process.

Importing audio using the Stem Splitter, making the tempo map takes care of setting Bar 1. The clicks are not written into any split tracks.

It's easy to set Bar 1 manually if you don't want to hear the count-in over the audio.

Open the audio file using BIAB open command and place the audio file onto the Audio Track
Save the project
Open the Audio Edit Window
Place the curser at the very beginning of the audio wave file
Right click and select the Set this point as Bar 1
Ok out of the AEW

Open Stems Splitter
Select the Use existing audio button
Proceed normally

Because the split stems are aligned with the Master Track by the Stems Splitter, if you manually set Bar 1, it must be done first, before the stems are split in order to maintain proper alignment between all of the split Tracks.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
Set Bar 1.jpg (210.16 KB, 68 downloads)
Beggining of audio is set to Bar 1.jpg (200.88 KB, 68 downloads)
Use existing audio track.jpg (201.85 KB, 68 downloads)
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.