1. A method of developing a weighting matrix for a cochlear implant patient comprising: deriving an electrode stimulus signal from a first musical signal; 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 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.