In the brilliant, demanding Double Concerto, two sides of Holst’s character find expression, the mystical and reticent balancing the physical and audacious. Audiences gave the piece a mixed reception on its premiere in 1930,butlisteners of today would find in the bitonality and contrapuntal textures a musical language with which they are conversant. The three-movement piece I Scherzo, II Lament, II Variations on a Ground is arranged here fortwoViolins with rehearsal Piano with comments by the composer’s daughter.