this invention generally relates to system , methods and computer program code for editing or modifying speech affect . a speech affect processing system to enable a user to edit an affect content of a speech signal , the system comprising : input to receive speech analysis data from a speech processing system said speech analysis data , comprising a set of parameters representing said speech signal ; a user input to receive user input data defining one or more affect - related operations to be performed on said speech signal ; and an affect modification system coupled to said user input and to said speech processing system to modify said parameters in accordance with said one or more affect - related operations and further comprising a speech reconstruction system to reconstruct an affect modified speech signal from said modified parameters ; and an output coupled to said affect modification system to output said affect modified speech signal .