Many third-party voice memo or call recording apps use this naming convention for active recordings.
Because these are often "temp" files, they may not play in standard apps like iTunes or Spotify if the recording app crashed before saving the final metadata. Common Sources of "RecordTMP" Files RecordTMP (32) m4a
How to Recover Corrupted Audio Files
If the file won't play, it is likely missing its "header" (the data that tells a player how long the audio is). You can try these methods: Many third-party voice memo or call recording apps
Sites like Restore.Media or Online Converter specialize in fixing M4A files that were cut off (e.g., phone died during recording). phone died during recording).