jlertle / libkeyfinder Goto Github PK
View Code? Open in Web Editor NEWThis project forked from ibsh/libkeyfinder
Musical key detection for digital audio, GPL v3
This project forked from ibsh/libkeyfinder
Musical key detection for digital audio, GPL v3
libKeyFinder can be used to estimate the musical key of digital recordings. It is the basis of the KeyFinder GUI app, which is available as a binary download for Mac OSX and Windows at www.ibrahimshaath.co.uk/keyfinder For the most basic use case, do something like this: // Static because it retains useful resources for repeat use static KeyFinder::KeyFinder k; // Build an empty audio object KeyFinder::AudioData a; // Prepare the object for your audio stream a.setFrameRate(yourAudioStream.framerate); a.setChannels(yourAudioStream.channels); a.addToSampleCount(yourAudioStream.length); // Copy your audio into the object while (int i = 0; i < yourAudioStream.length; i++) { a.setSample(i, yourAudioStream[i]); } // Run the analysis KeyFinder::KeyDetectionResult r = k.keyOfAudio(a); // And do something with the result! doSomethingWith(r.globalKeyEstimate); Alternatively, you can transform a stream of audio into a chromatic representation, and make progressive estimates of the key: KeyFinder::AudioData a; a.setFrameRate(yourAudioStream.framerate); a.setChannels(yourAudioStream.channels); a.addToSampleCount(yourAudioStream.packetLength); static KeyFinder::KeyFinder k; // the workspace holds the memory allocations for analysis of a single track KeyFinder::Workspace w; while (yourPacket = newAudioPacket()) { while (int i = 0; i < newAudioPacket.length; i++) { a.setSample(i, newAudioPacket[i]); } k.progressiveChromagram(a, w); // if you want to grab progressive key estimates... KeyFinder::KeyDetectionResult r = k.keyOfChromagram(w); doSomethingWithMostRecentKeyEstimate(r.globalKeyEstimate); } // if you want to squeeze every last bit of audio from the working buffer... k.finalChromagram(w); // and finally... KeyFinder::KeyDetectionResult r = k.keyOfChromagram(w); doSomethingWithFinalKeyEstimate(r.globalKeyEstimate);
A declarative, efficient, and flexible JavaScript library for building user interfaces.
๐ Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
The Web framework for perfectionists with deadlines.
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. ๐๐๐
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
Google โค๏ธ Open Source for everyone.
Alibaba Open Source for everyone
Data-Driven Documents codes.
China tencent open source team.