A lossy MP3 can have a 99% similarity score to its lossless source but still have audible pre-echo. The score doesn't equate to quality; it equates to similarity.
: Designed for musicologists and researchers, this tool provides detailed spectral analysis of audio signals. audio comparer
(Windows/Mac – Subscription)
That evening, Elara wrote her report: “Tape A shows analog noise consistent with 1987 equipment. Tape B contains a digital artifact and a 6 dB noise-floor anomaly. Authenticity: Tape A only.” A lossy MP3 can have a 99% similarity