In either case, the sound card uses an analog-to-digital converter to digitize this signal. Most sound cards have a line in connector for an analog input from a sound source that has higher voltage levels than a microphone. Input through a microphone connector can be used, for example, by speech recognition or voice over IP applications. Ī common external connector is the microphone connector. The output signal is connected to an amplifier, headphones, or external device using standard interconnects, such as a TRS phone connector. Sound cards use a digital-to-analog converter (DAC), which converts recorded or generated digital signal data into an analog format. Sound cards are also used for computer-based communication such as voice over IP and teleconferencing.Ĭlose-up of a sound card PCB, showing electrolytic capacitors, SMT capacitors and resistors, and a YAC512 two-channel 16-bit DAC
Typical uses of sound cards or sound card functionality include providing the audio component for multimedia applications such as music composition, editing video or audio, presentation, education and entertainment (games) and video projection. Sound processing hardware is also present on modern video cards with HDMI to output sound along with the video using that connector previously they used a S/PDIF connection to the motherboard or sound card. The integrated sound system is often still referred to as a sound card. Sound functionality can also be integrated onto the motherboard, using components similar to those found on plug-in cards. The term sound card is also applied to external audio interfaces used for professional audio applications.
A Sound Blaster Live! Value card, a typical (circa 2000) PCI sound card.
0 kommentar(er)
