Notation Processing 451

A process for converting a .mp3 file of a violin melody to notated sheet music using digital signal processing is described in this work. With frequency domain analysis, the input signal was filtered with a Butterworth low pass filter to minimize background noise and higher frequencies. A rectangular window was implemented to determine the maximum frequency at each time point in the short time Fourier Transform. The frequencies were then notated using a classification algorithm which matched each frequency to a specific location on the music staff. The program has limitations in detecting note duration, fundamental frequency, and an issue of dominance of open string resonance. Keywords—STFT, DFT, FFT, filtering, music, mp3.