Are Trembling Before G-d and Genghis Blues both documentaries?
Genghis Blues Genghis Blues (1999) is a documentary film directed by Roko Belic. It centers on the journey of blind American singer Paul Pena to the isolated Russian Republic of Tuva due to his interest in Tuvan throat singing.
Blues for Allah Blues for Allah is a studio album by the Grateful Dead. It was recorded February 27  May 7, 1975, and released September 1, 1975. It was the band's third album on their own Grateful Dead Records label and their third studio album in a row. Though it has not received RIAA certification as of 2017, "Blues for Allah" was the group's highest-charting album until 1987's "In the Dark", reaching  12 during a thirteen-week stay on the "Billboard" Album Chart.