When you digitize a sound wave, you measure and record its at regular time intervals called the sampling rate.

Amplitude

Explanation:

Amplitude is defined as the function of the wave or signal which defines the fluctuation occurred in particular point from the equilibrium or mean position.This point is place on the vibrating object which measures the displacement happened due to the vibration,

Sampling rate is the the measurement of samples per unit which is recorded from the continuous signal or wave to display it as digital signal.Thus, amplitude and frequency of the signal are found uniform interval in digital form in sampling rate process.

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