With Converter App, you can convert AC3 files into many other formats:
AC3 to MP3 | AC3 to TEXT | AC3 to M4A | AC3 to FLAC | AC3 to AAC | AC3 to WAV
→ All AC3 Converters
If you want to keep working with your final FLAC, try:
FLAC to MP3 | FLAC to WAV | FLAC to M4A | FLAC to TEXT | FLAC to ALAC | FLAC to OGG | FLAC to MP4 | FLAC to WMA
→ All FLAC Converters