Third-party notices
The plug-ins and this site are built on other people's open work. Each is used under its licence, listed here.
iPlug2
zlib-style licence
The plug-in framework all three are built on. Copyright the iPlug 2 developers; based on WDL-OL and the original iPlug by Cockos.
VST3 SDK
MIT licence
Copyright 2026 Steinberg Media Technologies GmbH. VST is a registered trademark of Steinberg Media Technologies GmbH.
NanoVG and NanoSVG
zlib licence
Drawing the panels, and the logo in their footers. Copyright Mikko Mononen.
MetalNanoVG
MIT licence
NanoVG on Apple's Metal, in the macOS builds. Copyright Ollix.
dr_libs
Public domain or MIT No Attribution
Reading audio files in InterTone, for learning a target from a reference. By David Reid.
Roboto and Roboto Condensed
Apache License 2.0
The typefaces of the panels and of this site, by Christian Robertson for Google.