simple non-trivial gate VST3 plugin with AUv3 version (wrapped)

MacOS only

directions:

• brew install cmake
• download/clone steinberg vst3sdk, apple CoreAudio sdk, and this repo
• mkdir debug next to repo directory
• recommended file structure:

~/Documents/Code/plugin
+-- gate
|   +-- debug
|   +-- gate (this repo)
+-- sdk
|   +-- CoreAudio
|   +-- vst3sdk

• cd debug
• cmake -GXcode -DCMAKE_BUILD_TYPE=Debug ../gate
• xcodebuild

build will produce a gate.vst3 in ~/Library/Audio/Plug-Ins/VST3/, which is where a VST3-compatible host should be able to find it (try Element for a lightweight VST3 testing host). build will also produce an Audio Unit app extension in debug/bin/Debug/, where it will be automatically registered with pluginkit. counterintuitively compared to auv2, nothing needs to be moved into any library folder.