What is foo_dsp_clap?

This project is a plugin, called a DSP, for foobar2000, a popular music player on macOS built for Apple Silicon computers. It lets that music player run CLAP audio effect plugins on whatever you are listening to, and it comes with its own on-screen window to control the plugin and browse through its saved presets. Once installed, it adds a new option called CLAP Effect inside foobar2000's playback settings. A configuration window lets you pick from any CLAP audio effect installed on your system, load and switch between the presets that plugin offers, and either open the plugin's own built in control window or, for plugins that do not offer one, use automatically generated sliders for its settings. Whatever settings you choose are saved along with foobar2000's own preset system, so they come back exactly as you left them after restarting. It works alongside a sister project by the same author that does the same job for CLAP instrument plugins used for playing MIDI files, and the two share the same underlying code for talking to CLAP plugins. Building it requires foobar2000's own software development kit, which a bundled script can download and prepare for you, or you can point it at an already prepared copy if you have one from the related sister project. After building, restarting foobar2000 loads the new plugin. There are some real limitations worth knowing about. It only works on Apple Silicon Macs running foobar2000 version 2. Certain CLAP effects that compile code on the fly can crash foobar2000, because of a security restriction in how the app is built, so plugins that avoid that technique are safer to use. Rescanning your plugin folder uses more memory each time until you restart foobar2000, since macOS does not release a plugin's memory once loaded. The plugin processes stereo and mono audio, if you are listening to something with more channels, only the first two are processed and the rest pass through untouched. The project is released under the MIT license.