1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
//! # Pitch Detection
//! *pitch_detection* implements several algorithms for estimating the
//! fundamental frequency of a sound wave stored in a buffer. It is designed
//! to be usable in a WASM environment.
//!
//! # Detectors
//! A *detector* is an implementation of a pitch detection algorithm. Each detector's tolerance
//! for noise and polyphonic sounds varies.
//!
//! * [AutocorrelationDetector][detector::autocorrelation]
//! * [McLeodDetector][detector::mcleod]
//! * [YINDetector][detector::yin]
//!
//! # Examples
//! ```
//! use pitch_detection::detector::mcleod::McLeodDetector;
//! use pitch_detection::detector::PitchDetector;
//!
//! fn main() {
//! const SAMPLE_RATE: usize = 44100;
//! const SIZE: usize = 1024;
//! const PADDING: usize = SIZE / 2;
//! const POWER_THRESHOLD: f64 = 5.0;
//! const CLARITY_THRESHOLD: f64 = 0.7;
//!
//! // Signal coming from some source (microphone, generated, etc...)
//! let dt = 1.0 / SAMPLE_RATE as f64;
//! let freq = 300.0;
//! let signal: Vec<f64> = (0..SIZE)
//! .map(|x| (2.0 * std::f64::consts::PI * x as f64 * dt * freq).sin())
//! .collect();
//!
//! let mut detector = McLeodDetector::new(SIZE, PADDING);
//!
//! let pitch = detector
//! .get_pitch(&signal, SAMPLE_RATE, POWER_THRESHOLD, CLARITY_THRESHOLD)
//! .unwrap();
//!
//! println!("Frequency: {}, Clarity: {}", pitch.frequency, pitch.clarity);
//! }
//! ```
pub use Pitch;