and Harvey Sollberger, in recording, all interpret the fourth note in bar twenty-three as a B natural.

The piece has been recorded and released on:
* Members of the Columbia Symphony Orchestra, directed by Robert Craft - Varèse: Density 21.5, Hyperprism, Intégrales, Ionisation, Octandre, Poème Electronique (1959) CBS Masterworks - CBS 60286.
* Severino Gazelloni, flute (1967) WERGO