<Ul> <Li> It is commonly attributed to KDKA in Pittsburgh, Pennsylvania, which in October 1920 received its license and went on the air as the first US licensed commercial broadcasting station on November 2, 1920 with the presidential election results as its inaugural show, but was not broadcasting daily until 1921 . (Their engineer Frank Conrad had been broadcasting from on the two call sign signals of 8XK and 8YK since 1916 .) Technically, KDKA was the first of several already - extant stations to receive a' limited commercial' license . </Li> <Li> On February 17, 1919, station 9XM at the University of Wisconsin in Madison broadcast human speech to the public at large . 9XM was first experimentally licensed in 1914, began regular Morse code transmissions in 1916, and its first music broadcast in 1917 . Regularly scheduled broadcasts of voice and music began in January 1921 . That station is still on the air today as WHA . </Li> <Li> On August 20, 1920 8MK, began broadcasting daily and was credited by famed inventor Lee De Forest as the first commercial station . 8MK was licensed to a teenager, Michael DeLisle Lyons, and financed by E.W. Scripps . In 1921 8MK changed to WBL and then to WWJ in 1922, in Detroit . It has carried a regular schedule of programming to the present and also broadcast the 1920 presidential election returns just as KDKA did . Inventor Lee DeForest claims to have been present during 8MK's earliest broadcasts, since the station was using a transmitter sold by his company . In August 1921, teenagers Michael DeLisle Lyons, his younger brother Francis "Frank" Edward Lyons and Ed Clark (founder of WJR - Detroit) put the first radio in a police car in Toledo, Ohio . </Li> </Ul> <Li> It is commonly attributed to KDKA in Pittsburgh, Pennsylvania, which in October 1920 received its license and went on the air as the first US licensed commercial broadcasting station on November 2, 1920 with the presidential election results as its inaugural show, but was not broadcasting daily until 1921 . (Their engineer Frank Conrad had been broadcasting from on the two call sign signals of 8XK and 8YK since 1916 .) Technically, KDKA was the first of several already - extant stations to receive a' limited commercial' license . </Li> <Li> On February 17, 1919, station 9XM at the University of Wisconsin in Madison broadcast human speech to the public at large . 9XM was first experimentally licensed in 1914, began regular Morse code transmissions in 1916, and its first music broadcast in 1917 . Regularly scheduled broadcasts of voice and music began in January 1921 . That station is still on the air today as WHA . </Li> <Li> On August 20, 1920 8MK, began broadcasting daily and was credited by famed inventor Lee De Forest as the first commercial station . 8MK was licensed to a teenager, Michael DeLisle Lyons, and financed by E.W. Scripps . In 1921 8MK changed to WBL and then to WWJ in 1922, in Detroit . It has carried a regular schedule of programming to the present and also broadcast the 1920 presidential election returns just as KDKA did . Inventor Lee DeForest claims to have been present during 8MK's earliest broadcasts, since the station was using a transmitter sold by his company . In August 1921, teenagers Michael DeLisle Lyons, his younger brother Francis "Frank" Edward Lyons and Ed Clark (founder of WJR - Detroit) put the first radio in a police car in Toledo, Ohio . </Li>

When was music first played on the radio