Russell Hitchcock possesses one of the highest, clearest tenor voices in popular music. In a FLAC file (typically 16-bit/44.1kHz CD-rip or higher 24-bit), you hear the reediness of his throat, the breath intake before the chorus of "Even the Nights Are Better," and the natural reverb of the recording room. In MP3, these details become "swishy" artifacts.
Most old Air Supply CDs from the 80s sound thin. The 2005-2010 remasters found on The Definitive Collection feature dynamic range compression that is aggressive enough for radio, but not so brick-walled that it destroys the transients. This is crucial for FLAC conversion. Air Supply - The Definitive Collection -FLAC-
Both Tidal (HiFi tier) and Apple Music (Lossless tier) stream in ALAC (Apple Lossless), which is equivalent to FLAC. You can search the exact album there. However, streaming does not give you a local file to archive. Russell Hitchcock possesses one of the highest, clearest