The Ensemble effect creates the illusion of many voices playing in unison. Much like a chorus, it creates this effect by playing delayed copies of the incoming sound. On top of this, it modulates the phases of each voice to create a silky smooth result without any metallic flanging. The delay times for each voice are also modulated in order to detune each voice slightly.
Number of voices to play simultaneously.
How quickly to modulate the delay for each voice, affecting how detuned the voices will be.
Pans voices left or right for a stereo effect.
The dry/wet mix of this effect. A lower value will let some of the unmodified signal through.
Selects between different patterns for the modulations of the voices.
Whenever you have your mouse cursor over a snapin there is a small arrow at the top right corner (not visible in screenshot). It opens a settings panel where you handle presets.
It also has a "randomize" button that can be useful. I guess...
The small checkbox to the left of the plugin name is a checkbox that bypasses the effect when disabled.
The bottom right corner of all Kilohearts plugins is a resize handle for scaling the UI to any size. This allows you to get a good view of the controls whatever the screen resolution, and also comes in handy if you need big controls, e.g. when using Ensemble as a real-time effect on a touchscreen monitor during a live set. (This is not available when the snapin is used inside a snapin host.)