EQBase
7.2#1 in audio equalizer softwareFrom $39.99 a yearFree planAPImacOS
VisitEQBase suits Mac users seeking system-wide audio adjustment, headphone correction profiles, or system audio recording. Pro is for users who also want room correction, per-app controls, routing, or Audio Unit hosting.
JamesDSP suits Linux users who want audio effects for PipeWire or PulseAudio clients, including users who want to script custom DSP effects.