Music identification through audio fingerprinting
Music Identification Through Audio Fingerprinting
This project is essentially a simplified version of what Shazam does.
The flowchart on the right describes the series of steps.
Below is a brief summary. For detailed explanation with analysis, check out our Report.
We decimate the audio signal by a factor of 4 after passing it through a low pass filter (to smartly avoid aliasing). Thereafter, the signal is converted to frequency domain using the famous Fast Fourier Transform.
We take small chunks of the sample (roughly 0.3 seconds) and take the peak frequencies along a logarithmic scale. Those values are then associated with a hash value. We do so for all the songs and hence create a database.
We perform similar steps for the recorded sample. The answer is the song with the highest number of matches for a particular offset value.
- Python 3+.
- pip (package installer for Python). See here for installation.
- ffmpeg. See here for installation.
- PortAudio. Only for Linux/OSX users. Check your distribution's repos for latest builds. Instead you can also build it from source, see here.
- Install using pip (preferred in a virtual environment).
pip install Presto-Chango
- On the first run, create your database by specifying the location of your songs directory.
presto-chango create-db <songs-directory>
- Identify a song by either recording in real time or using a pre-recorded sample.
# Record in real time presto-chango identify # Use a pre-recorded sample presto-chango identify --file=samples/sample1.wav
- The algorithm returns the top five matches and the number of offsets that matched for each of them. Example
$ presto-chango identify --file="samples/sample_GAY.wav" Loading database . . . Database loaded Processing... Results: Kane Brown - Good as You (Official Music Video)_mS3TeZEp_PE.wav 41 Katy Perry - Never Really Over (Official)_aEb5gNsmGJ8.wav 39 Ed Sheeran - Perfect (Official Music Video)_2Vv-BfVoq4g.wav 37 Cody Johnson - On My Way To You (Official Music Video)_RKUENGsDXBA.wav 24 Jason Aldean - Rearview Town_WEUUvntknTI.wav 23
Building the source code
- Clone the repository
git clone https://github.com/yashrajkakkad/presto-chango.git cd presto-chango
- Create a virtual environment
python -m venv venv source venv/bin/activate
- Install the package. The
--editableflag makes it so that we don't have to reinstall everytime we make some change.
pip install --editable .
You can run the tester code if you're too lazy to record songs. It will cut random 30 second samples from songs and run the algorithm.
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
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