That's not it. The recording device itself is turning down the signal when there's heavy bass present. It does this to avoid clipping the audio signal, which would sound even worse than the sound you're commenting about.
@@SaveMeMoon You wouldn't want that function off. It would sound much worse without the limiting. It's likely a device-bound function that you can't disable anyway. Audio hardware is the bottleneck here.
I love perfume but I feel this was too distracting for the artist and audience with the moving of the screens physically by the artist. Perfume are amazing performers! Best performances are in Japan. Top notch! ✨