| | Timeline of trends in music (1930-1939) at opensource encyclopedia |
 | | Timeline of trends in music %281930 1939%29 in directory |
 | | As rural Mexicans begin moving into the cities, trumpets are added to traditional mariachi bands, and the music develops a more pronounced nationalist bent; Silvestre Vargas soon becomes the most popular mariachi performer |
 | | Cash founds SPEBSQSA, the barbershop harmony society; women's society follows shortly; barbershop quartets become a popular music staple, particularly in radio commercials; over the next decades, groups such as the Buffalo Bills and the Chordettes will achieve mainstream popular success. |
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