A simple single-header spectrogram generator in C++. The generated spectrograms use a linear scale and a hanning window function. The window size is customizable, but 256 by default. The code is fairly simple, but not very optimal. A more optimal implementation would replace the plain O(n^2) discrete fourier transform with an FFT algorithm like Cooley-Tukey that runs in O(n log n). This repo also contains a CMake project with a sample application that uses the header.
This project was written for educational purposes and is licensed under the MIT License.
A 300hz sine wave, on a spectrogram between 0 and 8000hz:
