A method for fitting to a recipient a cochlear prosthesis having a sound processor that processes received sound in accordance with a MAP, the method comprises providing, by the hearing prosthesis, combinations of voice prompts and test stimuli for testing values of an element of the MAP； receiving from the recipient an indication of which of said values are desirable； and revising the MAP with the desired value for the tested element. A neural-stimulating device for stimulating nerve cells of a recipient is provided.
