Audio Library – pitch detection algorithm

Does anyone know a good open source library to detect the harmonic pitch level intensity (chroma) of audio signals? That is, for a given audio clip, the intensity of each of the 12 music tones

http://en.wikipedia.org/wiki/Harmonic_pitch_class_profiles

As long as the speed (complexity) is good, it can be in C, C or Java I don't need it for real-time use, but I will use it on materials for hours, so speed is more important than quality

Solution

View the chromagram plugin. In the QM vamp plugin library To ensure that it is exactly what you want, you can download the binary and test it in sonic visualizer, and then compile it yourself