FLAC is a lossless compression format. It will reduce file size but keeps the audio quality. So-called “high-res” format on streaming platform like spotify (mandatory fuck spotify here) are usually mp3 320kbps so heavily compressed and lossy, indeed.
To my knowledge it’s lossless in CD quality only, in high-res modes it becomes lossy
FLAC is a lossless compression format. It will reduce file size but keeps the audio quality. So-called “high-res” format on streaming platform like spotify (mandatory fuck spotify here) are usually mp3 320kbps so heavily compressed and lossy, indeed.