Do not settle for a "FLAC" that was upscaled from an MP3. Check the spectrogram. A true FLAC of this album will have frequency response up to 22.05kHz (for CD rips) or beyond (for high-res). Look for rips from the Pink Floyd: The Later Years 5.1 Blu-ray (downmixed to stereo FLAC) or the official Qobuz/Tidal downloads.
Would you like help comparing the two masterings track-by-track, or instructions for ripping a CD to FLAC with EAC? Pink Floyd - A Momentary Lapse of Reason -FLAC-...