I was wondering because it seems like different stations of the same from certain major companies all have a similar "sound" like iheartmedia chr stations or others. How much do parent companies control the playlists of their pds/mds?
As some of the others have mentioned, it depends on the company. When it comes to CHR, most CHR's will sound similar regardless of ownership. Simply put, the hits are the hits, and all the stations that play the hits are going to be similar. I can remember traveling in the 80's when growing up, and I generally looked for stations that sounded the most like the ones at home. Whether it was a larger or smaller market, the CHR/Top-40 stations I liked at the time sounded mostly the same, even down to the jingles. Very few of those stations were co-owned at the time.
I can tell you, when I worked for Cumulus, the playlists were very top-down. We were expected to send our adds and rotations to the corporate brand managers at least weekly. We didn't get a lot of freedom in what we played. If our brand managers told us to play something, we were expected to play it. If the brand manager said move a song from one category to another, we'd better move it. I seem to remember some brand managers being more autocratic than others, but the company didn't leave too much alone after it came in. I may have mentioned this in another conversation with you, but my understanding is that Cumulus no longer has the top-down playlists. Local management can make its own decisions on which songs it wants to add. Cumulus does, however, still have brand managers, and it has a group deal with a consulting firm or two. So, if you're a local PD or MD trying to determine whether or not to add a song, you get the same data most everyone else does, which means you're probably going to make the same decisions. Once-in-awhile, two PD's or MD's might look at the same data and draw different conclusions, but that's uncommon. What I don't know is whether Cumulus allows individual stations and/or markets to use consultants outside of the brand managers and consulting firms it typically uses. I can't imagine the small market Cumulus stations have the budget to afford that, but, if it's permitted, the larger markets might.
One smaller broadcaster, Summit Media, recently networked all their classic rock stations to have exactly the same playlist and personalities, so corporate has total control.
I don't know that means corporate has total control, but it certainly means corporate could control the playlist if it wanted. SummitMedia is a programming focused operator, and it might be letting one of those local PD's make the playlist decisions for all of those stations without interference. The release I saw didn't say who the PD of the classic rock format was. From what I can tell from the company's website, it doesn't seem to have a format leader for rock formats at the present time.