Smith had a strong contralto voice, which recorded well from her first session, which was conducted when recordings were made acoustically. The advent of electrical recording made the power of her voice even more evident. Her first electrical recording was "Cake Walking Babies Home", recorded on May 5, 1925. Smith also benefited from the new technology of radio broadcasting, even on stations in the segregated South. For example, after giving a concert to a white-only audience at a theater in Memphis, Tennessee, in October 1923, she performed a late-night concert on station WMC, which was well received by the radio audience. Musicians and composers like Danny Barker and Thomas Dorsey compared her presence and delivery to a preacher because of her ability to enrapture and move her audience.