Louis Armstrong, one of the pivotal figures in jazz history, often performed with vocalist Velma Middleton. Armstrong's virtuosic skills on the trumpet and distinctive raspy singing voice, combined with Middleton's soulful, bluesy vocal style, produced a unique sound that was integral to the development of jazz and popular music in the 20th century. Their performances and recordings, such as "That's My Desire" and "Baby, It's Cold Outside", remain highly influential. Armstrong's improvisational techniques and Middleton's emotive delivery have left an indelible impact on subsequent generations of musicians.