.wav
WAV audioWaveform Audio File Format
Microsoft and IBM’s audio format from 1991. It normally stores uncompressed PCM samples, keeping full quality at the cost of large files.
Recording, editing and mastering, and sound effects for video and games.
Opens in Music, QuickTime, Windows Media Player, VLC, every audio editor
About WAV 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