Pitch detection algorithms

A collection of C++ pitch detection algorithms.

• McLeod Pitch Method
• YIN
• Autocorrelation removed because it gives incorrect results - MPM is an enhancement on standard autocorrelation
• DFT
• Goertzel

YIN and McLeod implementations are inspired by https://github.com/JorenSix/TarsosDSP.

MPM performs best on real musical instruments and voice; see https://github.com/sevagh/Pitcha and https://github.com/sevagh/transcribe, two of my projects which use the MPM.

Install

Optionally uses https://github.com/anthonix/ffts.

make && sudo make install.

To build portably, without linking to ffts (i.e. using time-domain autocorrelation, check mpm.cpp for details):

FFT_FLAG="-DPORTABLE_XCORR" make

To use in your code:

#include <pitch_detection.h> and g++ [...] -lpitch_detection

Examples usage

NB: using input vectors of size power-of-2 will perform better due FFT optimizations.

make examples

stdin:

$ ./bin/stdin
Usage: stdin <algo> <sample_rate>
$ ./bin/stdin mpm 48000 <samples/1337_hz_huge.txt
Size: 32368
Pitch: 1337

sinewave:

$ ./bin/sinewave
Usage: sinewave <freq> <algo> <size> <sample_rate>
$ ./bin/sinewave 1337 yin 8092 48000
Freq: 1337      pitch: 1337.48

Use ./sine-generator to generate sine waves and feed the result to stdin.cpp:

$ ./sine-generator/master/sine.sh | sh -s -- 4096 1337 | ./bin/stdin mpm 48000
Size: 4096
Pitch: 1337.01