A documentation on Eliane Radigue. She mentions how she places loudspeakers in the concert hall at 9’55”:
Guai ai gelidi mostri (1983) by Luigi Nono, with live electronics on 10 loudspeakers in the concert hall (of which you won’t hear anything on youtube of course…). A piece to hear live in the concert hall!
Streetwalker (1980) by Ellen Fullman, amplifying the skirt with contact microphones:
A short fragment of Three Short Stories and an Apotheosis (1985) by Annea Lockwood. You hear the audience throwing the loudspeaker ball (and laughing while doing this).
This fragment comes from the radio show Speaking of Music with Annea Lockwood as a guest .