Crate rack 

Rack - Audio Plugin Hosting for Rust

Rack is a modern Rust library for hosting audio plugins in your applications. It provides a clean, safe API for discovering, loading, and processing audio through VST3, AudioUnit, CLAP, and other plugin formats.

Quick Start

use rack::prelude::*;

// Scan for plugins
let scanner = Scanner::new()?;
let plugins = scanner.scan()?;

println!("Found {} plugins", plugins.len());

// Load a plugin
let mut plugin = scanner.load(&plugins[0])?;
plugin.initialize(48000.0, 512)?;

// Process audio (planar format - one buffer per channel)
let left_in = vec![0.0f32; 512];
let right_in = vec![0.0f32; 512];
let mut left_out = vec![0.0f32; 512];
let mut right_out = vec![0.0f32; 512];

plugin.process(
    &[&left_in, &right_in],
    &mut [&mut left_out, &mut right_out],
    512
)?;

Features

• AudioUnit support (macOS, iOS) - built-in
• VST3 support (Windows, macOS, Linux) - built-in
• CLAP support - coming soon
• cpal integration - optional, enable with cpal feature

Platform Support

• macOS: AudioUnit (default) and VST3
• iOS: AudioUnit only (VST3 not available on mobile)
• Windows: VST3 (default)
• Linux: VST3 (default)

AudioUnit provides the best integration on Apple platforms (native GUI support). VST3 is the default on Windows and Linux, and also available on macOS.

Re-exports

pub use error::Error;

pub use error::Result;

pub use midi::MidiEvent;

pub use midi::MidiEventKind;

pub use plugin_info::ParameterInfo;

pub use plugin_info::PluginInfo;

pub use plugin_info::PluginType;

pub use plugin_info::PresetInfo;

pub use traits::PluginInstance;

pub use traits::PluginScanner;

Modules

error

midi

MIDI event types and utilities

plugin_info

prelude

Prelude module for convenient imports

traits