The sound is an important part of a multimedia system for no less than images, so the sound card device. It is necessary that the importance of multimedia computer system. The sound card has been developing quickly in order to get a quality sound performance and distortion. At least, as well as the current 3-dimensional sound system, the clarity of the sound, which can be effective only depends on two major factors, namely, sampling rate, and the precision of the sample for which the accuracy of the sample it is defined [2]. By the ability of A/D Converter that has a resolution. How to estimate Digital signal values are similar to those of most audio signals. The resolution of A/D Converter, it is determined by the number of bits of the output signal, such as a-A/D Converter 8 bit value will be displayed at different levels-A/D Converter 256 16 bit will be displayed at different levels, more levels if the number 65,536 to make higher resolution and distortion of the signal sounds less and less, that is, the performance of the voice gets better, but the number of bits per sample are much sharper.
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