The invention relates to equipment for fitting a hearing aid to the specific needs of a hearing impaired individual. The equipment comprising a computer or similar device with soft-ware, where the device has display means for visual display of data, data entry means for entering hearing aid programming data into the device, data storing means, and data output means for outputting programming data to the hearing aid. According to the invention means are provided for selecting simultaneous settings relating to two or more different parameters relating to the processing of sound in the hearing aid to be programmed.