The audio signal that the computer recognized as Digital signal before it is converted to a sound that humans recognize. Your computer will need to change Digital signals to Analog signals and vice versa if you are importing from an external sound into the computer (audio signals from an external microphone, such as noise from audio out) will have to be converted into Analog audio into Digital exhibition contract. At present, many Mainboard has integrated the ability to sound management. In the event that this competency is Mainboard or but they want audio capability that is higher than that supplied on the Mainboard, the user must supply the Expansion Card types, also known as Sound Card or the Sound Board is installed. The clarity of sound is a good performance depends on the primary factor of 2 is the sampling rate, and the precision of the sample the sample precision is determined by the ability of A/D Converter that much resolution. How to estimate The digital signal is similar to most audio signals. The resolution of A/D Converter is determined by the number of bits of the output signal. -A/D Converter 8 bit value will be displayed at a different level of 256. -16 bit D/A Converter will be able to display a different value is 65536.
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