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 every plug-in is 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 and InterBalance, for learning a target from a reference. By David Reid.
NDI®
NDI SDK licence agreement
InterStream's NDI audio feed, sent with the NDI runtime, which travels inside each InterStream bundle with its licence. NDI® is a registered trademark of Vizrt NDI AB. ndi.video
libsrt
Mozilla Public License 2.0
InterStream's SRT stream, from Haivision's SRT library, version 1.5.7, built into the plug-in unchanged. Its source is at github.com/Haivision/srt.
Mbed TLS
Apache License 2.0
The encryption of InterStream's SRT stream when a passphrase is set, version 3.6.7, built into the plug-in. Copyright The Mbed TLS Contributors.
Roboto and Roboto Condensed
Apache License 2.0
The typefaces of the panels and of this site, by Christian Robertson for Google.