On Marian McPartland Piano Jazz, Sunday, July 17th, 7:00 p.m.Composer, poet, and vocalist Kurt Elling sets a new standard in jazz singing. He sings in a complex, commanding baritone, a richly grained voice with honeyed highlights, fusing his two personas: the poet and the musician. There are scat solos amidst the tender lyrics, stirring originals and unexpected arrangements of some familiar tunes.