The cheering sound is probably from Audience Response Duplicator (or: Laff Box). There's a good episode [1] about it on 99% invisible. [1] https://99percentinv

The cheering sound is probably from Audience Response Duplicator (or: Laff Box). There's a good episode [1] about it on 99% invisible. [1] https://99percentinvisible.org/episode/the-laff-box/ https://99percentinvisible.org/episode/the-laff-box/