Despite their death-metal foundation, Sweden’s Opeth are one of the most progressive of contemporary bands. Their epic songs clock in at an average of 10 minutes and feature some of the most orchestral movements this side of Pink Floyd. Lolling through acoustic interludes, delving into operatic bridges and swinging back into grinding, guttural verses, Opeth’s works are more like aural journeys than simple “tunes.” Therefore, it is enticing that they would be so bold as to release a double-disc live album compiling their most appreciated works from their 18-year history.

Unsurprisingly, The Roundhouse Tapes is one of the most impressive and comprehensive Opeth offerings to date. In keeping with tradition, the band manages to surpass their own achievements, even when offering something as simple as a live album of pre-released material. Recorded at London’s Camden Roundhouse during the 2006 Ghost Reveries tour, this nine-song (remember: 10 minutes apiece) marathon is divinely recorded and endlessly compelling thanks to dynamic tracks such as “Ghost of Perdition,” “The Night and the Silent Water” and “Demon of the Fall.” While the eclectic nature of Opeth’s borderline power metal might not appeal to all, their sense of diversity, technical proficiency and supremely documented live prowess commands respect.