CD Audio has a 16-bit resolution for both channels .
For example , CD audio has a sampling rate of 44.1 kHz ( 44,100 samples per second ) and 16-bit resolution for both channels ( stereo ) .If the analog signal is not already bandlimited then an anti-aliasing filter is necessary to prevent aliasing in the digital signal . ( Aliasing occurs when frequencies above the Nyquist_frequency have not been band limited , and instead appear as audible artifacts in lower frequencies . )
Digital audio