This "colorful" variety of country music is played on unamplified stringed instruments
If they played their instruments and sang in a distinctively country style, 
their blues songs ... the styles of music that came together to create rock and roll
, those prerock types of music need to be .... bass part that imitated the lines a 
string bass might play ..... tion of fiddle, mandolin, dobro (unamplified steel guitar)
,.