Sonogram

Sonogram is a highly flexible spectrogram and signal analysis toolset for the analysis of sound, music and speech signals in the frequency-domain with different algorithms.
The Wigner-Ville transformation is an excellent algorithm class for detail rich time-frequency analysis and much more briliant than the classical short time Fourier-transformation. The Pictures below show the impressive detail-rich resolution of the of the Wigner-Ville-Distribution (right) compared with the Fourier-Transformation (left).