Complex sentence: Initially, the early albums were of choirs, sacred music and children's music, however, the success of the earliest records of The LeFevres on 78 rpm (in the 1940s), caused the company to shift its focus to Southern Gospel.
Split into simpler sentences: Initially, the early albums were of choirs, sacred music and children's music. The success of the earliest records of The LeFevres on 78 rpm (in the 1940s), caused the company to shift its focus to Southern Gospel.