Spectrograms present an image of frequencies over time and convey a sound’s volume. They are created by feeding an audio signal into a Fourier transform, a mathematical model for translating ...

He’s using a Fast Fourier Transform routine crafted in C to run as efficiently as possible on the 8-bit chip. The video after the break shows that the results are quite pleasing, with just a bit ...

Discrete Fourier Transform (DFT), Windowing & Leakage, FFT & STFT, Spectrograms, Spectral Analysis and Estimation, Convolution, ARMA processes, Correlation, Coherence, Kurtosis, Multi-rate filters and ...