SInES Tools: Fo(u)r Moments Analysis of statistical moments to obtain the first four moments in frequency and time domains, followed by PCA

1. Click on "Start" to reset the tool.
2. Upload: Select at least 3 audio files (e.g. .wav). Use underscores "_" in filenames to group them later
    (e.g., "Wood_Hard_01.wav").
3. Click "Analyse" to extract temporal/spectral moments, apply z-score normalization, and compute the PCA.
4. Hover over data points in the plot to play the corresponding audio.
5. Export tables as Excel or show JS-Arrays.