I just found another, bigger problem, with Music XML
Steps to reproduce:
1: Create a new song, 16 bars, add chords to each bar, I used a style with 140bpm.
2: Use Bar settings to change to number of beats per bar to 3/4 at bar 9, 2/4 at bar 13, and 4/4 at bar 15
3: Use Bar settings to change the tempo to 120 bpm at bar 11
4: Generate and Save the song
5: File > Save Special > Save as Music XML file
6: File > Open Special > Open Music XML file (set the BB Song Bar Offset to zero if necessary)
7: Review the Chord chart for differences to the original song.

Here is the original song:

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It has the following bar changes:
**** Band-in-a-Box Report of Changes in the song at any bar ******
Song Title is: MusicXMLTests_b, File Name is E:\bb\AAA_MySongs\Development\MusicXMLTests_b.SGU [Thu, 14 Mar 2024 11:55:00]
Bar 9: TimeSig to 3/4.
Bar 11: All Choruses,Tempo Change = 120
Bar 13: TimeSig to 2/4.
Bar 15: TimeSig to 4/4.

This is the same song after saving as an XML file and then opening the XML file in BiaB:

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All of the XML usage is completely internal to BiaB. Definitely more work needed in my opinion.

Last edited by AudioTrack; 03/13/24 06:57 PM.

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