From the Bureau of Labor Statistics:
In May 2015, approximately 60,000 people were employed as musicians, singers, music directors, or composers in the United States. Roughly 37,000 of these workers were musicians and singers and 22,000 were music directors and composers. The median wage was about $24.00 per hour for both the musicians and singers and the music directors and composers—meaning half of these workers earned less than that amount and half earned more.
Over 13 percent of all musicians, singers, and related workers were employed in the New York-Newark-Jersey City, New York-New Jersey-Pennsylvania metropolitan area. There were 5,560 musicians and singers, with median hourly wages of about $40.00, and 2,280 music directors and composers, with median hourly wages of about $31.00 in the Big Apple.
The Los Angeles-Long Beach-Anaheim, California, area ranked second in the employment of musicians and related workers. The 3,600 musicians and singers in the L.A. area had median hourly wages of roughly $33.00, while the median wage of its 980 music directors was nearly $26.00 per hour.