BLUEGRASS MUSIC (c. 1946–present) Sometimes called country music in overdrive, bluegrass music is often characterized as high-speed, high-pitched, high-energy music. Taking its name from the legendary band (The Blue Grass Boys) led by mandolinist BILL MONROE in the late 1940s, bluegrass actually is more than just fancy pickin' and breathless singing. It is a music of great emotional power that borrows from country, GOSPEL, HONKY-TONK, and, more recently, jazz and rock to form a unique musical…