Harmonic EQ
Lathe
EQ the harmonics of the played note: a cut on harmonic 3 stays on harmonic 3.
lathe-windows-x86_64-0.1.0.zip · Windows x64 · CLAP

The problem
A cut at 130 Hz takes out the 3rd harmonic of F1, the 2nd of C2 and the fundamental of C3. The same bass sounds different on every note.
What Lathe does
- One band on each of harmonics 1–32 of the played note.
- "−12 dB on harmonic 3" stays on harmonic 3, whatever note plays.
- Odd/even balance, tilt over harmonic number, and Focus between the harmonics.
- Pitch from the audio, or from MIDI.