.3ga
3GPP audio
An audio-only file in the 3GPP mobile container, typically holding AMR or AAC speech. Some Android voice recorders, notably on older Samsung phones, save to it.
Voice and call recordings from older Android phones.
Opens in VLC, mpv, Audacity with FFmpeg
About 3GA files.flac
FLAC audioFree Lossless Audio Codec
A lossless audio codec created by Josh Coalson in 2001 and now maintained by the Xiph.Org Foundation. Files are noticeably smaller than WAV yet decode to an exact copy of the original.
Archiving CDs and high-resolution music without any loss of quality.
Opens in VLC, foobar2000, Windows Media Player, Audacity
About FLAC files