There was about a ten year period from around 68' to 78' of counter culture FM radio called "Underground" radio which has since been replaced by "Classic Rock". They usually had a DJ who spoke real low and peaceful and said things like "groovy" and "man" a lot. A lot of these stations were college radio stations but some were commercial.

Think about the old SNL skit with Dan Aykroyd switching from AM to FM. They played album cuts along with the hits. The Beatles White Album was not fluff. AM radio didn't play that album. You had to find it on FM. AM had a cover band called "Underground Sunshine" that played "Birthday".

I collect radio broadcasts. I have a tape of an FM station air check from 68'. There is a commercial for a Jimi Hendrix concert in Houston.

Mike, I know what you mean about bluegrass elites. You also have to play a Martin guitar, preferably a D-28.