A composition that marked the birth of the modern symphony orchestra, it was instead through the medium of the piano that Berlioz’s Symphonie fantastique became generally known to the public when Franz Liszt made a transcription of the work for solo keyboard. The project undertaken here by Jean-François Heisser and Marie-Josèphe Jude continues that respected tradition, but it doubles the stakes and multiplies the pleasure. The expanded sound palette offered by the two-keyboard piano constructed by Pleyel and housed at the Paris Museum of Music gives rise to unexpected colors emanating from the shared resonator box.