This can sometimes bypass a corrupted header and pull the actual audio out.
Sites like Restore.Media or Online Converter specialize in fixing M4A files that were cut off (e.g., phone died during recording). RecordTMP (32) m4a
If the file doesn't have a proper dot before "m4a," try renaming it to RecordTMP (32).m4a to see if your computer recognizes it. This can sometimes bypass a corrupted header and
How to Recover Corrupted Audio Files
Many third-party voice memo or call recording apps use this naming convention for active recordings. RecordTMP (32) m4a
VLC Media Player can often play "broken" or unfinalized files that other players can't. Import as "Raw Data" in Audacity: Download Audacity . Go to File > Import > Raw Data .