Transcoders and mixers having reduced algorithmic delay and processing complexity. A light strand including a plurality of light emitting elements is operatively coupled to the controller, as is a light pattern selector. The second adjustment mechanism includes a first gear driven by the support leg, a second gear engaging the first gear, a first threaded member fixed to the second gear, a first connecting member pivotally connected to the lens module, a second connecting member slidably connected to the first connecting member, and a second threaded member.