This page contains some examples of static morphed sounds arranged as a cyclostationary transformation. We chose the static transformation to emphasize the temporal aspects of the morphing techniques described in the article, specially the attack time and temporal envelope morphing. Click on the title to read the article.

Original Sounds



Here we present some examples of morphed sounds using some of the methods mentioned in the article to exemplify the perceptual diffrerences.

Clavi + Tuba

This example corresponds to the envelopes shown in the figures and exemplifies morphing between a plucked string and a brass instrument. There are several different timbral features to account for, such as attack time, temporal envelope and spectral shape features. Only the spectral shape features vary between the examples, since most temporal features can be manipulated independently.

Notice that we chose to compare two spectral envelope interpolation techniques proposed more recently, namely DFW and LSF, to the standard interpolation of sinusoidal analysis parameters (ENV). The spectral envelope of the noise component is interpolated using the same technique as the sinusoidal part. The clearly audible artifacts present in the DFW morphed sounds are due to the method itself, which is too sensitive to small fluctuations in spectral envelope form (formants).

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