1. A cochlear implant providing frequency-modulated electrical pulse trains, comprising: a plurality of electrodes; and a processor in communication with the plurality of electrodes, the processor generating frequency-modulated electrical pulse trains in one or more of the plurality of electrodes in response to: dividing data representing audio spanning a plurality of frequency bands into a plurality of bins associated with each of the frequency bands, each bin representing an energy level of the audio data within the frequency band within a period of time; associating each frequency band with a phase probability that starts at an initial phase probability value, resets to a minimum phase probability value after a pulse is generated, and increases from the minimum phase probability value to a maximum phase probability value over a period of time; for each bin, assigning a power probability as a normalized intensity for each bin, the normalized intensity being a number between a minimum power probability and a maximum power probability representing the energy level of the bin; and for each bin, generating a pulse in an electrode associated with the frequency band associated with the bin when a random number generated is less than the power probability divided by the phase probability.