1. A method of developing a weighting matrix for a cochlear implant patient comprising: deriving an electrode stimulus signal from a first musical signal including frequency harmonics; deriving a set of further stimulus signals having a defined musical relation to the first musical signal; selecting a set of weighting values for the stimulation electrodes for the electrode stimulus signal; setting the weighting values for the stimulation electrodes for each of the further stimulus signals; consecutively presenting each of the stimulus signals to the patient and individually adjusting the weighting values for each of the further stimulus signals as a function of the frequency harmonics until the series of stimulus signals elicits an increasing pitch percept according to the defined musical relation; storing the adjusted weighting values and assigning them to a corresponding analysis channel; iteratively repeating the process using one of the further stimulus signals as the first electrode stimulus signal until weighting values for a complete frequency range have been derived so as to map musical intervals to individual stimulation electrodes.