In my mind, Martin’s Waltz may be the prototypical fiddle contest waltz. It’s beautiful. It’s not quite as hard as it sounds, but it is tricky (so it sounds pretty darn tricky.)
Daniel Carwile really took this tune to a new level with his recording of it.
Martin’s Waltz according to Fiddler’s Companion
MARTIN’S WALTZ. Old-Time, Bluegrass; Waltz. D Major (‘A’ part) & A Major (‘B’ part). Standard tuning. AB (Frets): AA’BB’ (Phillips). Named after (composed by) bluegrass fiddler Benny Martin. Sources for notated verisions: Benny Martin via John Hartford (1964, Byron Berline) [Frets]; Byron Berline and Benny Thomasson (Texas) [Phillips]. Frets Magazine, “Byron Berline: The Fiddle,” June 1986; pg. 50. Phillips (Traditional American Fiddle Tunes), vol. 2, 1995; pg. 279.