In the mid-1970s, as program directors began to put more controls over what songs were played on air, progressive stations evolved into the album-oriented rock format. Stations still played longer songs and deep album tracks (rather than just singles), but program directors and consultants took on a greater role in song selection, generally limiting airplay to just a few "focus tracks" from a particular album and concentrating on artists with a more slickly produced "commercial" sound than what had been featured a few years earlier. Noted DJ "Kid Leo" Travagliante of influential station WMMS in Cleveland observed the changes in a 1975 interview: "I think the '60s are ending about now. Now we are really starting the '70s. The emphasis is shifting back to entertainment instead of being 'relevant'...In fact, I wouldn't call our station progressive radio. That's outdated. I call it radio. But I heard a good word in the trades, AOR. That's Album-Oriented Rock. That's a name for the '70s."