there is a dvd documentary out called "Respect Yourself", the story of Stax Records. Stax was started by a brother and sister (white folks) in an old movie theater in Memphis. Originally they were gonna record country and rockabilly there, but being located in a Black neighborhood they got turned on to the music that the people who lived around them liked to hear. There's a load of interviews with Steve Cropper and Duck Dunn, Booker T, Mavis Staples who all said outside the theater that old bullshit racism went on but inside the theater/studio black and white was no longer an issue of any sort and they were all connected by that.

After Dr. King was killed at the motel, things changed inside the studio and even the music was not a unifying force anymore they said. The music changed and Isaac Hayes took over where Otis and Sam and Dave left off. I think that Soul music pretty much died along with Dr. King.

It's a great documentary and explains a lot of what was happening in Memphis at that time in our history.

Respect Yourself