Short for Digital to Analog Converter. Also often abbreviated DAC, which is often pronounced “dack.” A DAC is the opposite of an A/D converter. It basically reassembles the digital one’s and zero’s back into an analog waveform. One of the key ingredients in this process is filtering, which is what makes the final analog result a smooth (as opposed to digitally stair stepped) waveform. DAC’s come in a variety of configurations and price ranges.