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jAudio 1.0 Feature Appendix

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Constant Q Feature

This feature implements an alternative to the FFT. Instead of linear bins, it creates logarithmic frequency bins using alpha as a parameter representing the number of semitones (2^1/12) per bin. While its use in MIR is recent, it is an old DSP feature, created during the period where FFT's required custom hardware to compute.

Bibliographic reference needed here.