A USB sound card controls audio devices connected to a computer such as speakers and amplifiers. It plugs into the computer’s USB port, making it highly compatible and easy to transfer between two or more computers. It is usually designed for mobile use in laptops, tablet PCs, and other portable devices.
A USB audio input/output sound card has a plug and play feature, which allows it to operate without installing driver software. It supports input devices such as microphones and recorders, and output devices like speakers and subwoofers. It is used for connecting audio equipment such as home stereos, microphones, powered speakers, and even musical instruments.
A USB Converter sound card converts analog audio signals to digital format and vice versa. It is used to connect analog devices such as cassette players and electronic instruments to the computer.