Nice but could be better
Would be really helpful to be able, after freezing the screen, to be able to drag a vertical line along the FFT which reports frequency and amplitude, and kind of snaps to peaks, or has a snap to peak option.
That way the user can measure specific points.
The automated pitch and amplitude graphs change much too fast. They should be stickier. Maybe always show the 8 dominant peaks, sorted by frequency. That way you’d be likely to still see a harmonic, even if it decayed faster than the fundamental. At the moment no peaks are measured under some amplitude value. That’s not ideal. Always show the first 8 regardless of amplitude.