V-Drums Development, Part 6: Circuit Board and Op-Amp Design When designing the new TD-50, a priority was to ensure that the digital-to-analog converter was capable of handling the superior sound associated with a flagship V-Drums kit. The final circuit board was subjected to waveform measurement and other vigorous quality control processes until we were satisfied the technology would perform according to our rigouous design specifications. We also paid close attention to the selection of the op