You downloaded someone else’s compressed re-encodes, then, not the actual official Team Negative1 releases.
Official releases of 4K77 and 4K83 are MKV files with multiple DTS-HD MA and Dolby Digital audio tracks, or Blu-Ray ISO files that also have DTS-HD MA and Dolby tracks. None of them are MP4/M4V and none of them have AAC audio.