One well-documented limitation for analog headsets is that audio quality is limited by the choice of ADC, DAC and audio processing in the phone, tablet, etc. Device manufacturers must carefully balance cost, power and quality. Whatever choices the device manufacturers make, cannot be un-done and better quality, more features, lower power or lower cost are only possible by choosing another product. When device manufacturers implement ADC 3.0, there are no analog to digital converters or digital to analog converters in the device. Device manufacturers can concentrate on optimizing power since features, cost and quality have been removed from what they influence.
ADC 3.0 headsets support up to 24bit/192kHz audio format for high audio quality. Headset manufacturers can add a local digital signal processor (DSP) to implement features like microphone beamforming, active noise cancellation, user-defined equalization, hot-word detect, and more. Of special interest is active noise cancellation (ANC), as shown in Figure 6.