Use (free, open-source). Load a track that should have high-frequency content (e.g., "Ride on Time"). A true FLAC (from CD, 16/44.1) will show a crisp cut at 22.05 kHz. Transcodes will have sharp gaps below 16 kHz or a hard brick wall at 20 kHz.
Tatsuro Yamashita OPUS ALL TIME BEST 1975-2012 (Normal Edition) tatsuro yamashita opus all time best 19752012 flac verified
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The compilation was mastered from the original analog tapes using modern digital equipment to ensure maximum clarity. tatsuro yamashita opus all time best 19752012 flac verified
The Ultimate Gateway to City Pop: A Deep Dive into Tatsuro Yamashita’s OPUS All Time Best 1975–2012