Sounds of America

The National Museum of American History and the Smithsonian Global Sound have an ongoing online program featuring born and raised American music of the yesteryears. Called "Sounds of America", the themes cover everything political and non-political in ranges from bluegrass, jazz, gospel and folk (for now). My personal favorite song is "Hold On" by The Montgomery Gospel Trio which can be found under "Freedom Songs of the U.S. Civil Rights Movement". Link goes to "Sounds of America".