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In part I we gave a "physical" definition for timbre. We stressed its "plural" aspect and discussed the elements which make it up and define it. Above all we discussed the infinite number of possible combinations between these spectral components.

We’re going to further this analysis by focusing on how different types of parameters such as intensity, duration, and space influence our perception of timbre. In fact, these variables are not isolated from each other: by changing one, we effect another either in a real, tangible way (which means that it can be physically measured) or subjectively ( perceived by our ears and our brains). Perceiving timbre as a whole is the result of our brains assimilating and evaluating all psycho-acoustics parameters.