For your info, I made some updates to my fix-16k branch. Also, after investigating more (thanks to Claude Code), here what seems to happen: ShazamKit AAR contains libraries with 16KB alignment (0x4000) During Android build, these libraries are re-aligned to 4KB (0x1000) The Android Gradle Plugin's strip/packaging process is changing the alignment So, are we sure that ShazamKit Android AAR has been verified to work with AGP 8.5.1+ and maintains 16KB alignment through the full build process? Maybe I missed something but at this point, I really don't know.

Hello @francescoPe, Thank you so much for your detailed answer! Well I guess that's good news, then. The error I'm referring to is shown in my Google Play Console: So if the shazamkit.aar library is fine, it means the error is on my end. Did you spot my mistake in my repo, by any chance? https://github.com/mregnauld/flutter_shazam_kit/tree/fix-16k Thanks a lot for your help!