Package vamp-nnls-chroma: Information

NNLS Chroma analyses a single channel of audio using frame-wise spectral
input from the Vamp host. The plugin was originally developed to extract
treble and bass chromagrams for subsequent use in chord extraction
methods. The spectrum is transformed to a log-frequency spectrum
(constant-Q) with three bins per semitone.

Package vamp-nnls-chroma: Information

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