All the control parameters are hidden under the hood, so the user can’t edit the existing presets. The current version of Voloco features six different pitch-correction modes, aka presets. See also: Best FREE Auto-Tune VST Plugins! Instead, it delivers the classic “T-Pain” effect with pitch-perfect notes that sound almost robotic. The software doesn’t even try to sound subtle or natural while correcting the out-of-tune notes. Voloco is a simple pitch correction software designed for music producers who use auto-tune as a creative tool. Resonant Cavity has released VST3 and AU plugin versions of Voloco, a freeware pitch correction effect for digital audio workstation software on PC and Mac.