1. A hearing assistance system for delivering processed sound to a listener, comprising: a controller configured to produce a distribution of a plurality of presets in an N-dimensional space automatically using a perceptual model, the plurality of presets including predetermined settings for a plurality of parameters of a signal processing algorithm, the perceptual model representative of the listener's hearing loss profile and providing for a prediction of difference between each pair of presets of the plurality of presets perceivable by the listener, the prediction of difference used by the controller to produce the distribution of the plurality of presets in the N-dimensional space.