The Marshall Tucker Band was also known to incorporate instruments such as the flute and saxophone into their country rock sound. Other acts associated with the first wave of Southern rock were Elvin Bishop, Wet Willie, ZZ Top and Lynyrd Skynyrd. In the early 1970s, another wave of hard rock Southern groups emerged. Their music emphasized boogie rhythms and fast guitar leads with lyrics extolling the values, aspirations – and excesses – of Southern working-class young adults, like the outlaw country movement. The music itself is heavily influenced by the late '60s electric rock music scene.