Tokyomeltdown has released an analysis plugin that shows the frequency response an EQ is actually applying, measured from the audio passing through it. The sound itself remains untouched.
One instance of EQ Mirror is inserted before the EQ and one after it. The two instances pair up on their own on the same track, determine which comes first, measure the delay the EQ introduces and align the two signals before comparing them, so no sidechain routing or setup is required. Most linear-phase EQs are handled without further adjustment.
The difference is drawn as a curve in real time while the EQ’s controls are adjusted, with the largest boost and cut labelled and the spectrum of the music behind it. The measurement is taken from the programme material at the level it is being played rather than from a test signal. Where left and right, or mid and side, are processed differently, the curve widens into a band and indicates which. Changes a curve cannot describe, such as distortion from modeled tubes and transformers, are shown as a single figure.
Available in VST3, AU and AAX plugin foramts for macOS (12 or later), EQ Mirror is priced $18 USD. A 14-day trial is available to try the plugin.
More information: Tokyomeltdown
