What is Audio Card? Md. Saifur Rahman An audio sound card (also known as a sound card) is an internal computer expansion card that president between input and output of audio signals to and from a computer on the control of computer programs.You may likeDo I need car insurance?What is car insurance?How could I get cheaper car insurance?What is auto insurance?Why Adulterant food is the barrier to sound health?What are the producers?What are food preservatives?What is food chain?What is tertiary consumer?