Stefan Asbury and Tanglewood Music Center (TMC) Conducting Fellows lead the TMC Orchestra in this eclectic program. Lost for decades and rediscovered in 2009, Florence Price’s folk-music-tinged 1932 suite Ethiopia’s Shadow in America portrays an enslaved man’s spiritual journey from the time of his arrival on this continent. Béla Bartók’s brilliantly lurid ballet score The Miraculous Mandarin is an astonishing feat of musical storytelling and imaginative orchestration. Sergei Rachmaninoff’s absorbing and emotionally wide-ranging Symphony No. 2 harks back to the late 19th century but at the same time is characterized by Rachmaninoff’s unique gifts for expansive melody and careful musical architecture.