1. An implantable programmable stimulator system comprising: a plurality of waveform controllers, each waveform controller comprising: memory containing non-parametric waveform data for at least one waveform preprogrammed to achieve electrical stimulation of biological tissue; a playback system programmed to play back the non-parametric waveform data for the at least one preprogrammed waveform as at least one output waveform; an output system that is configured to drive at least one output channel based on the output waveform, the output system selecting the at least one output channel from a plurality of output channels in response to a selection signal; an amplifier system comprising a plurality of amplifiers, each amplifier electrically connected to the plurality of waveform controllers, the each amplifier receiving at least one output waveform from at least one waveform controller and outputting an amplified output waveform, wherein the each amplifier includes input circuitry to aggregate the received at least one output waveform from the at least one waveform controller; and a system controller configured to provide control instructions to the each waveform controller, the control instructions including the selection signal and a designation of selective ones of the plurality of amplifiers for the each waveform controller to provide the corresponding at least one output waveform.