A compressor you can plug in: its state, a panel that draws it and a Web Audio engine that plays it, side by side. Play a pulsing signal and turn the knobs

A limiter you can plug in: its state, a panel that draws its transfer curve with a handle on the ceiling and an engine that plays it. Play a loop through it, push the gain and pull the ceiling down

A gate you can plug in: its state, a panel that draws its transfer curve with a handle on the threshold and an engine that plays it. Play a loop through it and raise the threshold: the quiet parts go

A de-esser you can plug in: its state, a panel that draws what it does at each frequency and an engine that plays it. Play a voice through it, lower the threshold and the s sits back

A multiband compressor you can plug in: its state, a panel that draws the three bands and an engine that plays it. Play a loop through it and hold one band down

A transient shaper you can plug in: its state, a panel with a handle for the attack and the sustain and an engine that plays it. Play a loop through it and drag the handle: up for more click, left for a shorter ring