Who was given credit to be the first to demonstrate scat singing?

Louis Armstrong is often credited as the first to demonstrate scat singing in jazz. His innovative vocal improvisation, particularly in songs like "Heebie Jeebies," showcased the use of nonsensical syllables and rhythms, which became a defining characteristic of scat singing. Armstrong's unique style and talent helped popularize this vocal technique, influencing countless musicians and shaping the future of jazz.