I agree it's a slightly quirky name. The "chroma" refers to chromatography. In order to create the finger"print", an image is first extracted from the audio. An

I agree it's a slightly quirky name. The "chroma" refers to chromatography. In order to create the finger"print", an image is first extracted from the audio. An image fingerprinter would probably use many of the same techniques (e.g. fourier transform).