Description:
Emofilt is an open source program to simulate emotional arousal with speech synthesis based on the free-for-non-commercial-use MBROLA synthesis engine written in the Java programming language. The emotional simulation is achieved by a process of transforming the intermediate MBROLA format (phoneme chain and prosody) based on rules. It is largely customizable with an interface to develop own rules and even own modification algorithms.
Papers:
F. Burkhardt, Emofilt: the Simulation of Emotional Speech by Prosody-Transformation, Interspeech 2005