Rack works like an FL Studio mixer insert: put it on a channel and build a chain of up to sixteen DarkPlugins plugins inside — Tune, DeEss, Freq, Press, Halo, Echo, Hall or any other from your library. Drag to reorder, every slot has an on switch and Mix (parallel, time-aligned, no comb filtering), and the full plugin window opens with one click. Rack adds up the latency of all plugins and reports it to your DAW, so the track stays in time, and switching slots on and off is click-free. Eight macros boil the whole chain down to a few knobs: "Vocal Louder", "Brighter", "More Reverb", "More Delay", "Tuning" — each macro drives any plugin parameters within the range you choose. Save the whole chain with its settings as a .dpchain preset, move it to another computer or send it to a friend; the built-in browser comes with 20 ready-made vocal chains for rap, trap and R&B (inspired by the sound of well-known artists — not official or affiliated with the artists), with DarkPlugins community chains coming soon. Rack itself is free for everyone with a DarkPlugins account. Plugins in the chain run on your own licences — a plugin without a licence plays in demo mode, and Rack shows right away where to buy or try it.