Featuring members of bands headed by Billy Taylor and George Russell, the latter of whom taught pianist Bill Evans here modal improvisation, which he then brought to the Miles Davis Quintet shortly thereafter and the Kind of Blue session. Though I'm not sure if the performance or the miking/mixing was off in the performance of "Concerto for Billy the Kid," which is presented definitively in the RCA album by the George Russell Jazztet, Jazz Workshop (1956). (The Kid being Evans.) (Donna, my ex, a punk rock fan primarily as a musical enthusiast, always loved the density of Russell's compositions, particularly this one and "Cubano Be Cubano Bop," his early chart for the Dizzy Gillespie Orchestra.)
Very happy to see and hear this.
George Russell's Los Angeles Times obituary, from 26 July. Rest in glory. (Alzheimer's, a real bastard.)