
The Hot 100 and Easy Listening charts became more similar again toward the end of the 1960s and into the early and mid-1970s, when the texture of much of the music played on Top 40 radio once more began to soften. Major artists of that time included Barbra Streisand, Carole King, Cat Stevens, James Taylor and Bread. Also, some of these stations even played softer songs by Elvis Presley, Linda Ronstadt, Elton John, Rod Stewart, Billy Joel, and other rock-based artists. By the early 1970s, softer songs by the Carpenters, Anne Murray, John Denver, Barry Manilow, and even Streisand, began to be played more often on “Top 40” radio and others were added to the mix on many AC stations. From the end of the 1960s, it became common to divide mainstream rock music into soft and hard rock, with both emerging as major radio formats in the US.

Hard rock had been established as a mainstream genre by 1968.
