Inspired by this youtube video i wanted to have my own version in FreePascal ;).
Features:
- Open and show frequency over time spectrum
- "Draw" own frequencies
- Preview Loaded sound
- Store own drawn frecuences
Following you can see the "custom" created of the tschirp.wav

If you want to validate the correct representation of the results you can use this website.
- Download and install FFTW from (https://www.fftw.org/)
- Download and instll Bass from (https://www.un4seen.com/)
