摘要：Normally, to determine the dynamic range of a sound card, a spectrum analyser is used.
However, the spectrum analyser can be replaced by using the sound card combined with
FFT (Fast Fourier Transform) analyser software. This low-cost design is implemented
on a personal computer (PC). A sinusoidal signal is given as an input to the sound card,
and the FFT analyser program is used in determining the dynamic range from the
spectrum. This approach is able to identify the dynamic performance of the sound card.
