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A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term sound card is also applied to external audio interfaces used for professional audio applications.
For instance, the default device for sound input and output is /dev/dsp. Examples using the shell: cat /dev/random > /dev/dsp # plays white noise through the speaker cat /dev/dsp > a.a # reads data from the microphone and copies it to file a.a OSS implements the /dev/audio interface.
Widely used in consumer electronics for audio and video. A single connector must be used for each signal. SCART: Consumer electronics, mostly in Europe. Carries analog stereo sound, along with composite video and/or RGB video. Some devices also support S-Video, which shares the same pins as composite video and RGB.
Rear of a PCI sound card showing 3.5mm analog outputs. The interface between an auditory output device and a computer is the sound card. Sound cards may be included on a computer's motherboard, installed as an expansion card, or as a desktop unit. [6] [7] The sound card may offer either an analog or digital output.
In some cases, an audio output device can be used as an input device, in order to capture produced sound. Audio input devices allow a user to send audio info to a computer for processing, recording, or carrying out commands. Devices such as microphones allow users to speak to the computer in order to record a voice message or navigate software.
There is a switch behind the Sound Blaster X7 to switch modes between driving a pair of 4-ohms or 8-ohms passive speakers. [ 3 ] With its bundled 24V, 2.91A power adapter, it can deliver up to 27 watts per channel to 8-ohms passive speakers and up to 38 watts per channel to 4-ohms passive speakers.
Sound cards (53 P) Sound chips (1 C, 32 P) T. Touchscreens (5 C, 16 P) Pages in category "Computer output devices" The following 33 pages are in this category, out of ...
Computer speakers, or multimedia speakers, are speakers sold for use with computers, although usually capable of other audio uses, e.g. for an MP3 player. Most such speakers have an internal amplifier and consequently require a power source, which may be by a mains power supply often via an AC adapter , batteries, or a USB port.