Three-minute singles grew to become the norm from the early 60s (Pretty much all made in stereo audio by then) and record corporation bosses debated about the probability of good results for Bob Dylan’s 1965 track “Just like a Rolling Stone,” which lasted in excess of 6 minutes. A: https://kylergarft.iyublog.com/38873612/the-basic-principles-of-45-record-awards