voxvowel()

voxvowel(source, vowel, timbre)

Description

voxvowel() filters a source through a three-formant vocal model. The vowel argument selects one of five vowels, while timbre changes the apparent vocal-tract size. Small smooth transition zones around the vowel boundaries prevent abrupt changes and automation clicks.

Arguments

source: the signal to process. Harmonically rich oscillators such as saw(), pwm(), pdsin(), or fft() usually produce the clearest vowel character.
vowel: vowel selector in the range 0.0 to 1.0.
timbre: vocal-tract character in the range 0.0 to 1.0. Lower values sound smaller and brighter; higher values sound larger and darker.

Vowel Map

Vowel range	Vowel	Recommended value
0.0 to 0.2	a	0.1
0.2 to 0.4	i	0.3
0.4 to 0.6	o	0.5
0.6 to 0.8	u	0.7
0.8 to 1.0	e	0.9

For clear vowel targets, use 0.1 for a, 0.3 for i, 0.5 for o, 0.7 for u, and 0.9 for e. Adjacent vowels are blended within a narrow 0.075-wide region centered on each boundary.

Example

0.5*velolog()*attack(300)*release(24000)*
voxvowel(saw(X)+0.18*pwm(0.5*X,0.42),param(0),param(1))

[Vowel: 0.0; Timbre: 0.5;]

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