Contourtonist

web demo — the plugin’s own equal-loudness DSP, compiled to WebAssembly · no microphone, the fader is the room GitHub ↗
beyond ISO 226 validated range — extrapolated
▪ target curve · ▪ fitted bank (16 biquads)
spectrum: ■ in / ■ out
status waiting room curve built for curve peak 0.00 dB fit error 0.00 dB G(1 kHz) 0.00 dB, always
100 dB 2.0 dB/s 1.0 dB 12.0 dB

The plugin’s control-rate default is 0.5 dB/s — on a show, nobody should hear the system EQ move. The demo default is faster so the effect is easier to catch.

System level
100.0 dB SPL
0.0 dB
IN
OUT