Goldilocks94941 said:
...only those songs that got a high score in an artificial research setting,
A "research setting" is no more artificial than a home or a workplace or in the car. People hear snippets of songs and are asked how much they would like to hear that song on the radio today. That's totally real.
then at least why don't you go deeper into the catalog of the artists your studies find appealing, rather than trying to narrow it to just a particular song or two you played in an auditorium?
... because stations play songs, not artists. At any given moment, the PPM scrutinizes how much listeners like what they are hearing at that moment. Since all of us have artists we like, but few of us like every single song our favorite artists have done, the measurement is based on each song.
In any case, classic hits stations test, over time, about every song that has been popular in the past by an artist to see which are popular, still, today.
Mix in more of the music those core artists have released a few times an hour to encourage longer listening,
The effect is exactly the opposite, as stations who have tried too-big playlists or too-deep cuts have found.
and introduce the element of welcome surprises that used to be part of the reason we'd turn the radio on in the first place.
There is no evidence that classic hits listeners want to be surprised. They want to be entertained with songs they know and love, not stiffs.
Or at least add some of these artists' other material in the evenings, including longer album versions of their hits, and see how it eventually goes.
It's been done. Most of use either made the big playlist mistake ourselves (often followed by a pink slip) or watched others commit musical suicide and we know that it never works.
And younger audiences will never know there is a vast repertory of great music, at least when they listen to your station.
People outside your target demo will not be drawn in by more songs they don't know. If anything, the broad based hits that are still liked today have a better chance of attracting "fringe" listeners.
You're making people who want something more than cheeseburgers go elsewhere to satisfy their tastes.
First, people don't listen longer or become more loyal with big playlists. They tend to listen less, and often never. The average of 700 to 800 songs on a classic insures that most listeners will not hear songs for around two weeks...