FOF synthesis

Ideas behind FOF synthesis:

• FOF stands for ``Fonction d'onde formantique''.
• Formant= peak of energy in the spectrum.
• Reconstruction of a sound by superposing the contributions of each formant.
• A FOF is a ``grain'' representing a fundamental period of a signal corresponding to a formant.
• Summing different FOFs together allows to obtain voice synthesis.
• It is a sinusoid multiplied by an exponential envelope.
• The parameters of a FOF (amplitude, frequency, decay) correspond to the parameters of a formant (amplitude, central frequency, bandwidth).