EVIL OTTO
Free OTT Compressor
Evil Otto is our free take on the OTT-style multiband compressor: aggressive upward-and-downward compression that squashes a sound into place and makes everything feel louder, denser, and a little unhinged. Three bands, independent thresholds, gain-reduction metering, and a sidechain input. Drop it on a bus, a synth, a drum loop, or a whole mix and lean on it as hard as you like.
It is genuinely free on desktop. No trial, no nag screen, no DRM, and no expiration date waiting to ruin your afternoon. The iOS version carries a small price because supporting that ecosystem isn't free for us, but the macOS, Windows, and Linux builds cost you nothing but an email address. The native Linux build ships right alongside the others, same as everything we make.
MANUAL (340kb PDF file)
FORMATS
CLAP, VST3, AAX
Windows 10 or newer and a 64-bit DAW.
CLAP, VST3, AAX, AudioUnit
Universal Binary 2 for Intel/M1 macOS 10.13 or newer and a 64-bit DAW.
AUv3 64-bit
iOS 13 or newer and a separate purchase in the App Store
CLAP, VST3, LV2
Ubuntu 20 or later and a 64-bit DAW.
Evil Otto is a free download on desktop; iOS has a small price due to the cost of supporting that ecosystem. We just ask that you join our mailing list. You can dip on out after, no hard feelings, but we don't mail very often, and we hope you'll stick around. If you're already a member, all good, the automation will send you a download link.
FAQ
Is Evil Otto really free?
Yes. The desktop versions for macOS, Windows, and Linux are a free download in exchange for joining our mailing list. No trial period, no DRM, no expiration. The iOS AUv3 version is a small paid purchase in the App Store.
What is OTT compression?
OTT is a style of aggressive multiband compression that applies upward and downward compression at the same time, pushing quiet parts up and loud parts down across three frequency bands. The result is a dense, forward, hyper-detailed sound that's a staple of electronic and bass music. Evil Otto gives you that with per-band thresholds, gain-reduction metering, and a sidechain input.
What formats and platforms does it support?
VST3, AU, AAX, and CLAP on macOS (Universal Binary 2); VST3, AAX, and CLAP on Windows 10 or newer; CLAP, VST3, and LV2 on Ubuntu 20 or later; and AUv3 on iOS 13 or newer. A 64-bit DAW is required on desktop.