ambisonic

Compose and play 3D audio.

The library provides 3D sound scene support on top of rodio. It allows positioning and moving sound sources freely in 3D space around a virtual listener, and playing the resulting spatial mix in real-time over a sound card.

ambisonic is built around the concept of an intermediate representation of the sound field, called B-format. The B-format describes what the listener should hear, independent of their audio playback equipment. This leads to a clear separation of audio scene composition and rendering. For details, see Wikipedia.

In its current state, the library allows spatial composition of single-channel rodio sources into a first-order B-format stream. That stream is rendered to a two-channel stereo signal, and played through a rodio sink. Although at the moment only stereo output is supported, the B-format abstraction should make it easy to implement arbitrary speaker configurations in the future.

Usage Example

use std::thread::sleep;
use std::time::Duration;
use ambisonic::{rodio, AmbisonicBuilder};

let scene = AmbisonicBuilder::default().build();

let source = rodio::source::SineWave::new(440);
let mut sound = scene.play(source);

// exaggerate doppler effect
sound.set_doppler_factor(10.0);

// move sound from right to left
sound.set_velocity([-1.0, 0.0, 0.0]);
for i in 0..1000 {
    sound.set_position([50.0 - i as f32 / 10.0, 1.0, 0.0]);
    sleep(Duration::from_millis(10));
}
sound.set_velocity([0.0, 0.0, 0.0]);