Pedalboard 2 is described as 'A VST (plus AudioUnit on OSX) plugin host designed for live use. Based on the JUCE 'audio plugin host' code, heavily modified to better suit my purposes' and is an app. There are more than 25 alternatives to Pedalboard 2 for a variety of platforms, including Windows, Mac, Linux, BSD and Flathub apps. The best Pedalboard 2 alternative is LMMS, which is both free and Open Source. Other great apps like Pedalboard 2 are Carla, Audio Hijack, Zrythm and Light Host.
Cross-platform digital audio workstation supporting lossless audio and VST plugins. Features include music looping, sequencing, and MIDI support. Provides an ad-free, privacy-focused, portable experience without registration, working offline with extensibility through plugins and add-ons.
Carla is an audio plugin host, with support for many audio drivers and plugin formats. It has some nice features like automation of parameters via MIDI CC (and send output back as MIDI too) and full OSC control.
Capture audio seamlessly. Audio Hijack supports macOS for recording from applications like iTunes and Skype, and devices like microphones. It features customizable effects, real-time monitoring, and various save formats with scheduled recordings and a drag-and-drop interface.
Zrythm is a digital audio workstation designed to be featureful and easy to use.
A minimalistic VST host. Holds up to 4 VSTs. Allows for multiple instances (see how on GitHub). If you try to load an unregistered plugin, it may fail. Register somewhere else, then load it. If the sound clicks a lot, increase the buffer size or switch to Direct Sound in Audio...
VSTStuff is an ideal solution to play and record audio files, load VST audio effect plugins and connect these to the VSTStuff audio player.
Element is a cross-platform, modular AU/VST audio plugin host. Create powerful effects racks and instruments by connecting plugins to one another. Load graphs on the fly for quick access to your sounds.
Cantabile is a music workstation for live performing musicians. Build your ideal rig - one that leaves you free to focus on giving your best performance.
SAVIHost lets you basically turn a VST instrument plugin into a standalone app. It's a very simple VST host that loads up a similarly named VSTi dll file and lets you interact with the plugin as if it's been loaded into a DAW complete with keyboard and extensive options...
Plogue Bidule is a modular audio software with full VST, Audio Unit and Rewire support.
Live, modular sound design environment that enables a user to combine, split, layer and chain their VST instruments and FX.
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Unlike PedalBoard this is less buggy and has more features. the UI is horrendous though, nothing to complain if you get used to it