I see some slight differences between filenames when I use the same Dynamic Naming formula between a FLAC encoder and an Arrange Audio converter. This has to do with restricted character replacement set in advanced settings. Do the two encoders not use the same source of truth? I could send example in a private message along with the File Name Character Replacement settings.
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I managed to isolate the issue more specifically - a trailing period in track title is handled differently by the FLAC converter vs Arrange Audio converter.
This is on dBpoweramp on macOS. Source and target both FLAC. Only variable between runs is which converter is used.
Summary
When a track title ends in a period, the FLAC converter preserves that period in the output filename while Arrange Audio strips it. Same dynamic naming formula, same settings, same source file — two different filenames.
Example
Track title tag: S.O.S.The character replacement table is not the causeFLAC converter 05 S-O-S..flac Arrange Audio 05 S-O-S.flac
I initially assumed this was the a . → - rule in File Name Character Replacement in Advanced Settings. It isn't. With that rule removed entirely, the divergence persists unchanged:Interior periods track the table correctly in both converters. The string-final period tracks nothing — it appears never to reach the replacement stage at all. Note that with the rule present, neither converter produces what the rule specifies, which would be 05 S-O-S-.flac.. → - present 05 S-O-S..flac 05 S-O-S.flac no . rule 05 S.O.S..flac 05 S.O.S.flac
This is by naming formula
[IFVALUE]album artist,[album artist],[IFCOMP]Various Artists[][IF!COMP][artist][][]/[album]/[IFMULTI][SETLEN]2,48,,[disc][]-[][track] [title]
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