r/FreeSounds • u/rootsashok • 45m ago
Effect [Contribution] SLTune: free vocal autotune and formant shifter (macOS AU / Windows VST3)
I’m releasing SLTune, a free pitch-correction plug-in for monophonic vocals.
It handles gradual correction and hard tuning, with custom note sets, MIDI targets and an adjustable A4 reference (420–480 Hz). Formant shifting covers ±24 semitones, with a separate mix control and switchable tune/formant processing order.
Two LFOs provide tempo-synced modulation, including dotted and triplet rates. The second can switch to an envelope follower for voice-driven pitch and timbre changes.
LIVE reports 2 ms of plug-in latency at 48 kHz. HIGH uses 64 ms for cleaner formant processing; extreme shifts in LIVE can still produce artifacts. Interface and buffer latency are additional.
Available as AU for Apple Silicon Macs and VST3 for Windows x64 with English manual.
Images: https://imgur.com/a/kvJd9Qk
