From Manufacturer
Cacophony from Soundiron is a massive collection of live concert hall performance sound effects, room tones, crowd reactions, orchestral tuning drones, and incidental sound effects.
The library includes hall room tones, audience applauses, murmurs, and reactions, pit orchestra and ensemble tuning cacophonies, warm-ups, and incidental sound effects from great to small. These elements can be used for sound design in any style of music, video games, movies, VR, television, and apps, or to simulate the environment of a live performance whenever you need it.