You might want to look into EqualizerAPO. You could use a browser that you don't normally use (eg if your default is Firefox, use Chrome), set up a virtual outp

You might want to look into EqualizerAPO. You could use a browser that you don't normally use (eg if your default is Firefox, use Chrome), set up a virtual output using e.g. VB-Audio Virtual Cable, have it to go out via EqualizerAPO, and then run VSTs or other DSP software via EqualizerAPO on that particular output device.