Interpolating an audio file creates a mirror of the spectrogram above the original audio file's Nyquist frequency. This script isolates the mirrored part and shifts it back to the original range, resulting in some nightmare-inducing sounds. The script may have possible applications in sound design and signal processing. Audio signals with low samplerates usually result in more audible results.
- Signal Processing Toolbox
The funcion works as a drop-in replacement for audioread().
[wave, sampleRate] = spectroflip("path_to_file.wav");
Spectrograms of the original and "flipped" audio files, respectively.
