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A PCI sound card, also known as a PCI audio card, is a type of expansion card. It's installed in a computer's PCI (Peripheral Component Interconnect) slot to enhance the audio capabilities. PCI sound card serves as an interface between the computer's motherboard and the audio devices, enabling the computer to produce and reproduce sound efficiently. A PCI sound card consists of several components, including digital-to-analog converters (DACs), analog-to-digital converters (ADCs), audio processors, audio coders, onboard memories, interface connectors, and MIDI interfaces.

Advantages of PCI sound cards

PCI sound cards can improve audio quality. They typically feature high-quality DACs and ADCs that provide superior audio fidelity compared to onboard audio solutions. The dedicated hardware components and better signal processing capabilities produce more precise and accurate sound reproduction. They can capture audio from microphones, instruments, or other external sources with less background noise. Moreover, many PCI sound cards feature surround sound technologies, such as Dolby Digital and DTS. They can decode and process multi-channel audio formats, providing an immersive experience. Thus, they are beneficial for settings that are mixed in surround sound, such as movies and music. In addition, PCI sound cards often come with software or drivers that allow users to customize and control various audio settings. Users can adjust volume levels, equalizer settings, and sound effects to tailor the audio output. What's more, PCI sound cards often have onboard memory and dedicated processors that reduce latency. The low latency is crucial for real-time applications like gaming, where even slight delays can negatively impact the user experience. Last but not least, PCI sound cards offer a variety of input and output connectors, including line-in, microphone-in, headphone/speaker-out, and additional connectors for MIDI devices. The versatility allows users to connect multiple audio devices simultaneously and easily switch between them.

Types of PCI sound cards

Standard PCI sound cards are commonly internal PCI sound cards. They are designed to be installed inside a computer's case and connect to the motherboard via a PCI slot.

Special sound cards include low-profile PCI sound cards and mini-PCI sound cards. The former is also known as half-height PCI sound cards, which are shorter in height compared to standard PCI sound cards. They are usually used in small form factor PCs, HTPCs (home theater PCs), and other compact systems. On the other hand, mini-PCI sound cards are smaller form factors of the PCI interface, commonly found in laptops. It's worth noting that mini-PCI sound cards are less available than other sound cards. They are often specific to certain laptop models or embedded applications.

PCIe sound cards can fit the PCI interfaces with slot adapters. They can offer improved performance and bandwidth compared to older PCI sound cards. PCIe sound cards typically include PCIe 5.1 sound cards and PCIe 7.1 sound cards. PCIe 5.1 sound cards are designed to support 5.1 channel audio output. They provide six audio channels: front left, front right, center, rear left, rear right, and a subwoofer channel. On the other hand, PCIe 7.1 sound cards support 7.1 channel audio output. They have two additional audio channels on the left and right sides.