Aftertones of Infinity is a symphonic poem written by the American composer Joseph Schwantner.
The work was commissioned by the American Composers Orchestra and completed in 1978.
It was first performed by the American Composers Orchestra conducted by Lukas Foss in Alice Tully Hall, New York City, on January 29, 1979.
Reviewing a 1991 revival of the piece, the music critic Allan Kozinn of The New York Times wrote:The piece begins with a nonspecific shimmer and proceeds spacily for several moments before its strands begin to coalesce.
When they do, the results are violent eruptions of percussion, brass and string writing, sometimes in patches so dense as to become a toneless aggregate.