Bamako, Mali, 1973: Rail Band, the official orchestra of the Malian state railway, drops their self-titled LP. It’s a relentlessly soulful and hypnotic blend of American funk, jazz horns, and Afro-Cuban music, reflected through centuries-old Mandé tradition and blasted at top volume by some of the continent’s greatest artists.

Led by legendary trumpet and saxman Tidiani Koné and held aloft by the intricate web of Djelimady Tounkara’s rumbling, reverb-soaked guitar, Rail Band’s sprawling compositions embody West African storytelling traditions while exulting in the technology and modernity of a newly independent Mali. Vocalists Salif Keita and Mory Kanté, two heroes of African music who would achieve global fame as soloists, are endlessly emotive, oscillating between silky ballads and funk screams. The band’s sound is filled out by layers of percussion, rolling guitars, and melodic horns filtered through the Caribbean.

Starting in 1970, Rail Band played five nights a week, from 2 pm til the early hours, at the Buffet Hotel de la Gare. Their audience was an international array of businessmen, young partiers, and people of the Bamako night. The band was incredibly versatile, switching genres, rhythms, and styles to meet their crowd. It was a volatile mix, one that would fall apart soon after these recordings were made, with Salif Keita’s departure to start the rival Les Ambassadeurs. Though Rail Band continued in many distinguished forms, the eight songs on this album reveal one of the greatest bands to ever exist, at the height of their creative powers.

On “Duga,” a composition dating back to the 13th century and passed on through oral tradition by the jelis (griots), the Rail Band replaces balafon with the interplay of Cheick Tidiane’s speaker-rattling bass and Alfred Coulibaly’s tasteful organ. “Marabayasa,” with its iconic sax intro and Mory Kanté channeling James Brown, is a deep-cut favorite of DJs around the world. Part of a long and regal lineage of Malian guitar orchestras initially tasked with translating the region’s traditional music to modern instrumentation, Rail Band morphed and reenvisioned those traditions with a style and energy that has never been matched.