(57) An emotion conveyed on a sound is synthesised by selectively modifying elementary
sound portions (S) thereof prior to delivering the sound through an operator application
step (S10, S16, S20) in which at least one operator (OP, OD; OI) is selectively applied
to the elementary sound portions (S) to impose a specific modification in a characteristic,
such as pitch and/or duration in accordance with an emotion to be synthesised.
This can be achieved by applying at least one operator (OIrs, OIfs, OIsu, OIsd) to
modify an intensity characteristic of an elementary sound portion, and/or an operator
(OPrs, OPfs) for selectively causing the time evolution of the pitch of an elementary
sound portion (S) to rise or fall according to an imposed slope characteristic (Prs,
Pfs), and/or an operator (OPsu, OPsd) for selectively causing the time evolution of
the pitch of an elementary sound portion (S) to rise or fall uniformly by a determined
value (Psu, Psd), and/or an operator (ODd, ODc) for selectively causing the duration
(tl) of an elementary sound portion (S) to increase or decrease by a determined value
(D).
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