A therapy program is modified to decompose an electrical stimulation signal defined by the therapy program into a plurality of sub-signals based on a comparison between an energy associated with the stimulation signal and a threshold value. An electrical stimulation signal defined by a therapy program may be decomposed into a plurality of subsignals when an electrical stimulation energy of the stimulation signal exceeds the maximum energy output of the medical device or of a channel of the medical device. The energy associated with each one of the subsignals may be less than the energy threshold value of the medical device.