Audio card, which is also known as a sound card is a computer expansion card that facilitates the input and output of audio signals to and from a computer under control of computer programs.
In most of the case, the typical uses of audio card are including:
Editing video or audio,
Presentation with audio effect,
Normally, audio card is referred as a digital-to-analog converter (DAC). It has the ability to convert record digital data into an analog format. The output signal is connected to an amplifier, headphones or external device using standard interconnects.
However, the only downfall of the general audio card is it becomes a hassle to add new PCI audio device to a PC. In this case, the USB Audio Card project is the best choice to overcome the disadvantage of the general audio cards!
The project is based on a high-speed USB and a powerful ATmega162L-8PI microcontroller. The incredible USB B-type-to-A-type cable is the most amazing cable for this USB audio card. By using this cable, it allows you to connect the audio card to the PC with only a simple switch!
Also, you can listen to MP3 and WAV files with the USB audio card, by simply connecting the earphone to the card!