DC is the home of quality recording since it begin and ends 2012

 Although Edison began experimenting on the phonograph using wax coated paper as a recording medium, his phonograph recorded sound onto a tinfoil sheet phonograph cylinder. Alexander Graham Bell's Volta Laboratory made several improvements in the 1880s, including the use of wax-coated cardboard cylinders, and a cutting stylus that moved from side to side in a "zig zag" pattern across the record. http://en.wikipedia.org/wiki/Phonograph