Plugin Compatibility

pedalboard allows loading VST3® and Audio Unit plugins, which could contain any code. Most plugins that have been tested work just fine with pedalboard, but some plugins may not work with pedalboard; at worst, some may even crash the Python interpreter without warning and with no ability to catch the error.

Most audio plugins are “well-behaved” and conform to a set of conventions for how audio plugins are supposed to work, but many do not conform to the VST3® or Audio Unit specifications. pedalboard attempts to detect some common programming errors in plugins and can work around many issues, including automatically detecting plugins that don’t clear their internal state when asked. Even so, plugins can misbehave without pedalboard noticing.

If audio is being rendered incorrectly or if audio is “leaking” from one process() call to the next in an undesired fashion, try:

1. Passing silence to the plugin in between calls to process(), to ensure that any reverb tails or other internal state has time to fade to silence

2. Reloading the plugin every time audio is processed (with pedalboard.load_plugin)