{"value"=>"<p>These recordings contain the entire concert, including Helen Hayes's narration of \"50 Years of Jazz,\" which was never released. The narration is in between the music selections. Armstrong with Edmond Hall, clarinet; Trummy Young, trombone, Billy Kyle, piano; Dale Jones, bass; Barrett Deems, drums; and Velma Middleton, vocals. Recorded live at Medinah Temple, Chicago.</p> <p>There are two sources of this concert present. The first are open-reel tapes, possibly copies of the original masters. The second came from cassette tapes derived from a 1994 re-mastering, sent to Avakian for his reference.</p>"}