Gondwana (1980) is a defining musical composition of spectral music[1] for large orchestra composed by Tristan Murail using simulated synthesis to create a harmonic interpolation between an orchestrally synthesized chord derived from a simulated bell sound (inharmonic) and a chord derived from a trombone sound (harmonic).
[2] This process is meant to evoke the shifting of continents and thus the piece is named after the former supercontinent Gondwana.
[3] The piece uses interpolation to make a smooth transformation on all musical parameters including spectral profile, envelope, and instrumental attacks.
[4] The bell sounds were created through a Frequency Modulation (FM) synthesis with a single modulator affecting five carriers to create five different harmonies, these being connected by interpolated chords.
[5] The components of the trombone's frequency spectrum was derived through a Fourier transform.