Multi-tone electronic organ music note identification method based on constant Q transformation

A note identification method of electronic organ multi-tone music based on constant Q transformation comprises the following steps: acquiring single-tone audio of an electronic organ, and performing constant Q transformation on the single-tone audio to obtain a single-tone frequency spectrum template; carrying out note segmentation on the playing music signal, and searching a local maximum value of an energy curve in an analysis time period by adopting a method of superflux and calculation of a frequency spectrum vector difference of two adjacent frames so as to determine the position of a starting point; analyzing the contained fundamental frequency by taking the segmented musical notes as units to obtain a spectrogram of the musical notes, and comparing the obtained spectrogram of the musical notes with the single-tone frequency spectrum template to obtain the fundamental frequency contained in the musical notes; subtracting the identified fundamental frequency from the frequency spectrum of the note in pro