American
                    Music in the United States  
              Resource
                      for American Music
              The
                  Library of Congress has perhaps the strongest collection of
                  popular music of any library in the world. It has sheet music
                  for standards ("Someone to Watch over Me"), for tunes
                  so well-known it is hard to imagine them as notes-on-paper
                  ("My Melancholy Baby"), and for thousands of songs
                  that hoped for popularity in vain--"popular" in style,
                  unpopular in fact. 
              Most
                  important to the researcher, it has the many tunes that were
                  once popular and are now little-known. These tunes may be important
                  for conjuring up a time; understanding a reference in a novel
                  (it was in the Music Division that "Seaside Girls," the
                  song Leopold Bloom remembers obsessively in his wanderings
                  around Dublin, in James Joyce's Ulysses, was first found);
                  or documenting the use of a word (the Oxford English Dictionary
                  lists the song "Mr. Jefferson Lord, Play that Barber Shop
                  Chord" as the first use of "barbershop" for
                  a style of harmony). 
              The
                  Music Division's collection of American popular music is strong
                  from the beginnings (whatever you may define those beginnings
                  to be); for European and Latin American popular music its collection
                  is strong from the 1920s on. Thus, if you are interested in
                  what Josephine Baker sang in Paris--or Charles Trenet, or Jacques
                  Brel--the Library of Congress is your best American source;
                  if you want to find the kind of dance-band arrangements that
                  were really played at the Berlin cabarets between the wars,
                  they are at the Music Division, too. 
              Or
                  if you are interested in the Cuban conjunto music which forms
                  the basis of Oscar Hijuelos's The Mambo Kings Play Songs of
                  Love, you will find much of it--ready to slap on the stands
                  and play--in the Music Division. 
               Barbershop
                  - Of, consisting of, or relating to the performance of sentimental
                  songs for unaccompanied, usually male voices in four-part harmony:
                  a barbershop quartet.
              Music
                    that reflects a nation’s culture:
              Classical
                      Music
              Rhythm
                        and Blues 
              Jazz
              Rock
              Current
                        Music
              BMI 50th
                      Anniversary History Book
                A
                current American musical perspective can be seen in documents
                from the library of BMI. The following categories provide highlights
                of the music. 
               Rhythm & Blues
                      at BMI
              Rock & Roll
                      at BMI
              Country
                      Music at BMI
              Hooray
                      for Hollywood at BMI
              Jazz
                      at BMI
              Note:
                  Unless otherwise noted, all material is from U.S. Department
                  of State – Info USA
  http://usinfo.state.gov/usa/infousa