Recursive Moving Average Filter

I implemented a recursive moving average filter to reduce background noise in some test audio files. It works in the time domain, which makes it faster than FFT-based algorithms when the number of points is […]

Analysing Attack Times

I used the spectrogram to detect attack times in a single line melody by shaping signal’s power graph. It works better with only slow passages in which the notes are separable from each other. I […]

Parabolic Peak Interpolation

I applied interpolation technique to the spectral peak based on fundamental frequency after FFT was taken. It is basically to find a better estimation of the peak by using the max spectral bin (of fundamental), […]

Hamming, Blackman, and Blackman-Harris

This is my implementation for some of windows used in audio applications. I chose Hamming, Blackman, and Blackman-Harris window functions. Instead of using FFT pack, I directly applied DFT since the DFT size is not […]

Discrete Fourier Transform

This is my DFT implementation to test a wav file. It only accepts mono wav files with 44100 Hz sample rate. I used 32 floating point (with max 23 mantissa) in the range -1 and […]