Abstract: A method, device, and computer-readable storage medium for providing digital side tone are disclosed. These embodiments are directed toward processing digital side tone in a secondary processing unit external to a primary processing unit that includes the main digital signal processor, thereby reducing delay in producing side tone and freeing up processing resources in the primary processing unit. In an environment where the sampling rate of a digital-to-analog converter in the secondary processing unit is an integer multiple of the sampling rate of an analog-to-digital converter in the secondary processing unit, the components of the secondary processing unit are made to operate such that the digital side tone signal and the main tone signal are equal in sampling frequency and number of samples.