Complex sentence: While the lyrics of his songs were often religious, his music drew from both sacred and blues traditions and is distinguished by his powerful bass thumb-picking and gravelly false-bass voice, with occasional use of a tenor voice.
Split into simpler sentences: While the lyrics of his songs were often religious, his music drew from both sacred and blues traditions. His music is distinguished by his powerful bass thumb-picking and gravelly false-bass voice, with occasional use of a tenor voice.