signature major minor flat third Moonlight Sonata Piano Sonata No. 14 in C-sharp minor psychoacoustics relative pitch absolute pitch reference pitch 以下係篇文引咗嘅學術文獻或者網頁:
Richard, G., David, B., & Févotte, C. (2010). Source/filter model for unsupervised main melody extraction from polyphonic audio signals (PDF). IEEE transactions