The members of Take 6 come down the stairs at New York’s Blue Note jazz club in November of 2018, wireless microphones in hand and creating a complete orchestra of funk with their voices as they walk. They’re having fun. Alvin Chea’s resonant bass thumps and leaps as vocal percussion clips and whooshes. They slide through a narrow aisle, brushing the backs of fans sitting at tables as they smile and then ease up onto a stage set with six stools and, almost an afterthought, a couple of keyboards and guitars. The bracing harmonies of the group’s several tenors ring with jazz tension, sounding like a horn section for Earth, Wind and Fire or, well, the Count Basie band.