Coltrane is undoubtedly the one who visited the free jazz in its most remote regions. Among the records the last two years of his life, it is probably the most intense. One hour of screaming, absolute fury which one does not come out unscathed if one is not prepared. Hardly calming here except the preamble to "My favorite things" by Jimmy Garrison on bass. This concert somehow contradicts previous recordings "Interstellar Space", "Expression" and "Stellar Regions" (released post), where Trane seemed chastened and oriented to calmer voice. What a journey, in just ten years, between "Blue train" and this record! The sound is poor but who cares: it is the ultimate testimony of a work teeming with recognition continues to assert itself.