Compressing audio files generally leads to a significant loss of quality. Compression of more than 2/3 leads to a dramatic loss of quality. So it was never an option for me.
- You can also upload audio files > 5MB to the assets (using 7-Zip/WinRAR).
- You can add big files to the assets later (outside of AI2). See: How to build a big app → APK max. 100 MB or → AAB 150 MB