Underrated and bleak. "The Idol" and "As Strong as Samson" are bass-heavy tracks that require the robust low-end response of a 320 file.
Note: Some box sets (like Pandora’s Box) contain multiple discs. The “26 CDs” here refer to individual disc volumes in a typical curated digital library. Procol Harum - Discography 26 cds - mp3-320
Metadata & File Organization tips
This set is simply the 11 studio albums. It expands into: Underrated and bleak