A harmonic buzz shaped by up to five formant resonances. Each rail is a formant: drag the center mark to move F within its allowed range. One bandwidth slider widens/narrows all formants together (scaled by center frequency). F4 and F5 have fixed centers. Toggle a formant with its button on the left. The amber dot is the fundamental.
Output — measured from the final mix
level —
Waveform — peaks flattening at the dashed ±1 lines (and turning red) is clipping
Spectrum (log frequency) — peaks are overtones; amber marks show the formant centers