This page presents miscellaneous results obtained with the method described in the article above. Click on the title of this page to download the article and delve deeper into the significance of the results presented.

We will present sounds synthesized with the spectral envelopes shown in the article and compare them with other transformations to illustrate the different perceptual possibilities that can be potentially achieved with the technique.

The synthesis step is very simple and consists basically in replacing the spectral envelope during the steady state part of the sound. We should bear in mind that there is no temporal modeling and the sounds are only meant to exemplify the perceptual differences we can achieve by designing the spectral envelope with the technique described in the article. The synthesis procedure is not the object of the article, rather, the spectral envelope design using perceptual features is.


Original Sounds

clavi
tuba

Results

The first column represents a regular morphing where all descriptors vary equally according to the morphing factor alpha, as we presented elsewhere .

The second column contains the transformation presented in the article, which illustrates sounds whose centroid shifts from source (clavi) to target (tuba), keeping the other spectral shape descriptors (spread, skewness, kurtosis and slope) constant.

The third column contains the inverse transformation and illustrates sounds whose centroid is kept constant, while the other spectral shape descriptor (spread, skewness, kurtosis and slope) values shift from source (clavi) to target (tuba).


Regular Morphing = All descriptors vary equally according to the morphing factor alpha

Evolutionary Morphing Centr = Only Centroid varies according to the morphing factor alpha

Evolutionary Morphing All = Only Centroid is kept constant and other descriptors vary according to the morphing factor alpha

Regular Morphing Evolutionary Morphing Centr Evolutionary Morphing All
alpha = 0.1


alpha = 0.2


alpha = 0.3


alpha = 0.4


alpha = 0.5


alpha = 0.6


alpha = 0.7


alpha = 0.8


alpha = 0.9