Time Stretcher

C++ audio time-stretching implementation, based on the algorithms presented in:

• Audio Time Stretching with an Adaptive Phase Vocoder, Nicolas Juillerat and Beat Hirsbrunner (ICASP 2017)
• Harmonic/Percussive Separation using Median Filtering, Derry Fitgerald (DAFx 2010)

Dependencies

Building the time-stretching library requires FFTW. Building the library tests requires libsndfile.

With apt:

sudo apt-get install fftw3
sudo apt-get install libsndfile

Or with HomeBrew:

brew install fftw3
brew install libsndfile

Building Tests

Building the code requires CMake.

cmake -Bbuild -DBUILD_TESTS=ON
cmake --build build --config Release

./build/hpss can be used to test the harmonic/percussive source separation algorithm. ./build/stretch can be used to test the time-stretching algorithm. Use the --help flag for more information about how to use each test.

License

The code in this repository is licensed under the BSD 3-clause license.

Enjoy!