When Nirvana released “Smells Like Teen Spirit” in 1991, its main riff echoed Boston’s “More Than a Feeling,” from 1976. But whereas “Smells Like Teen Spirit” became an anthem for cynical grunge-punks and other disaffected slackers, “More Than a Feeling” was a more nebulous beacon that resonated with heavy-lidded stoners and hypnagogic dreamers. Much of Boston’s majestic sound on other early tracks such as “Don’t Look Back” and “Rock & Roll Band” was the result of guitarist-songwriter-producer Tom Scholz’s multiple layers of heavily processed guitar in his home recording studio. He still manages to replicate that sound and volume onstage, with vocalist Tommy DeCarlo doing a credible job of replacing late lead singer Brad Delp. Joan Jett, meanwhile, found common ground between punk and classic rock by keeping the loud guitars and adding bubble-gum hooks.