The window

Five colored rails, in signal order, left to right and top to bottom:

• VOICE (green): how notes become pitch.
• SUB (blue): the mono low path.
• GRIND (amber): the stereo path, in four stages divided by dashed lines.
• MOD (violet): the three modulation sources and where they go, then the shared amp envelope, the two tilts and their pivot.
• MASTER (coral): output trim and the ceiling.

Below them, three meters. The header holds the preset navigator, an output meter, and your registration status; the sounding note reads beside the VOICE title. “BY DARKEFFEKT” in the header opens the GrindSub page in your browser.

Along the titles, the sound itself. The SUB PATH title carries the sub’s waveform in blue and the GRIND PATH title the grind’s in amber, each locked to the note so it holds still: a low note is a long wave and a high one a short wave, level is height, and what the filter and shaper do to the grind is right there in the line. Both fade when the instrument is silent.

Knobs drag up and down; hold Command (Control on Windows) while dragging for fine control, and the mouse wheel steps. Double-click returns a knob to its default. A knob whose range runs both sides of zero, such as the tilts, the bias, and the mod amounts, fills its arc outward from zero, snaps to zero when a drag comes close to it (fine control passes through the snap), and goes to zero on Option-double-click (Alt on Windows). Cutoff fills from 0 st too but does not snap to it, because 0 st is an interval like any other.

Controls that do nothing under the current settings dim and stop responding. If a knob looks faded, something upstream of it is switched off: unison at 1 silences Detune and Spread, Chorus off silences its three knobs and the Stereo switch, and so on.

The window resizes: drag the corner, or resize it from the host, and everything scales together between half and one-and-a-half times its normal size. The size is saved with the project.