Answer:
The two musicians were Earl Scruggs and Lester Flatt
Explanation:
Earl Scruggs was a banjoist while Lester Flatt was a guitarist. When they joined Bill Monroe's band, the sound completely changed, something that is still recognized as Monroe's Signature Sound.
Bill Monroe was born William Smith Monroe in the State of Kentucky in 1911. He was a mandolin player and a famous songwriter who is credited with creating the Bluegrass sub-genre of Country music, that was popular in Southern States and the Bible belt.
By 1948, both Earl Scruggs and Lester Flatt left to form their own bands. However, their impact on Monroe's sound was lasting and shaped his music for the coming years.
