Revival with Michael Atchison — your weekly alternate history of music -- airs Sundays from 10 a.m. to noon. This week brings the final installment of our special three-part series leading up to the 50th anniversary of The Beatles’ White Album on Nov. 22. We’re moving chronologically through the years 1963 to ‘68, a period that transformed the sound of popular music and set the stage for the next three decades. Last week, we explored 1965 and ‘66, years when the Beatles, Beach Boys and Bob Dylan helped move music into the album age, even while artists like Frank Sinatra held their own on the charts. In this week’s first hour, we move through the year 1967 and the psychedelic summer that brought us Sgt. Pepper’s Lonely Hearts Club Band and The Jimi Hendrix Experience. And in the second hour, we reach 1968, a time when The Beatles, The Band and The Rolling Stones created the sounds that would become cornerstones of modern rock.