In episode 57 of the Podcast for Social Research's "Practical Criticism" series, the first of a new season, Rebecca Ariel Porte plays Nala Sinephro and Pharoah Sanders and Floating Points for Ajay Singh Chaudhary, who, as usual, doesn't know what the object of the week will be. Their conversation ranges over promises, promissory structures, broken promises, avant-jazz and minimalism, Coltrane's "sheets of sound," phasing, convalescence, composition and the medicinal, conversations and echoes, and the sound of nothing to prove.