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The installation and connection method of a sound card depends on its type.

— Internal. These models are designed to work as a permanent component of the system. They are installed in the computer's case, in a slot on the motherboard (PCI or PCIe, see "Connection Interface") in such a way that only the panel with inputs and outputs is usually visible from outside. One of the main advantages of internal cards is their compactness—they do not take up external space and hardly affect the dimensions of the system unit. At the same time, these models can range from the simplest budget options to advanced professional solutions. On the other hand, the connection of internal cards is less universal and more complicated than external ones: it requires at least opening the PC case, and the installation options are limited by the motherboard's specifications and available space inside the case. It's also considered that cards of this type are more susceptible to electromagnetic interference since they are located in close proximity to the computer's electronic components.

— External. As the name implies, models of this type operate outside the PC case and use appropriate connection interfaces—USB or FireWire (see below). The advantages of external cards include convenient connection: plugging a connector into an external socket is much easier and faster than dealing with the case's internals. Beca...use of this, one card can be easily used on multiple computers, reconnecting as needed. Additionally, they are indispensable for laptops and some desktop computers where the installation of internal sound cards is not structurally feasible. Another advantage is their distance from the computer's "innards," which reduces the level of interference. The main drawback of this type of card is the need for additional space near the computer; moreover, more advanced models generally occupy even more space. Furthermore, for devices requiring additional power (see below), a separate socket will be needed.

The main interface used to connect a sound card to a computer or other device.

Like the sound cards themselves, the interfaces used in them are divided into internal (PCI, PCIe) and external (USB-A, USB-C, FireWire, Thunderbolt, 3.5 mm mini-jack, Bluetooth). Here's a more detailed description of each of these options:

— PCIe. The main modern interface for connecting internal peripherals (including sound cards) to computer motherboards. It is used in most internal type models (see above). The main advantage of PCIe solutions is that connectors for their connection can be found on almost any modern "motherboard". True, these connectors may be needed for other components — graphics cards, TV tuners, or even SSD drives; however, even the simplest motherboards usually have several PCIe slots, so this point cannot be considered a serious disadvantage.

— PCI. An interface for connecting expansion cards to the PC motherboard. It is the predecessor of PCIe, has significantly lower bandwidth and more modest capabilities, so overall it is outdated. Nevertheless, motherboards with such connectors, and sound cards for the PCI interface (including quite advanced ones), continue to be produced. This is because working with sound requires comparatively low bandwidth; and installing a so...und card in a PCI slot leaves PCIe connectors free, which may be required for components more demanding on connection speed. In any case, before purchasing such a sound card, it does not hurt to separately ensure that there is a connector for its connection on the "motherboard".

— USB-A. Connection through a standard USB port. Until recently, it was the most popular interface for external peripherals, found in almost all PCs and laptops. Most external sound cards were made for USB. The disadvantage of this connection method is that USB connectors may be needed for other devices, which creates problems with a small number of ports and an abundance of peripherals. On the other hand, such situations arise not so often, and to solve them, it is enough to have a USB hub on hand.

It should be noted separately that full-size USB ports in modern PCs and laptops have been replaced by more compact USB-C (see below).

— USB-C. A peripheral connector with a symmetrical contact group, which often replaces full-size USB ports on modern PCs and laptops. Many new models of external sound cards are made for this interface. The only exceptions are individual Thunderbolt devices (see below) — for them, Thunderbolt is indicated as the peripheral connection port, not USB-C.

— Thunderbolt. A universal peripheral port mainly used in Apple computers and laptops. It is important to consider that different generations of Thunderbolt differ in the type of physical connector: versions v1 and v2 use the miniDisplayPort socket, version v3 uses the USB-C socket. So when choosing a sound card with such a connection, it is necessary to clarify this point. On the other hand, Thunderbolt versions with different connectors are fully compatible with each other through corresponding adapters.

— FireWire. Also known as IEEE 1394. An interface for external devices that was somewhat popular some time ago but has now almost fallen out of use.

— 3.5 mm (mini-jack). The mini-jack is one of the most common audio connectors. However, it is usually provided as one of the audio inputs (see below) and is very rarely used as the main interface for connecting a sound card to an external device. Such a connection is mainly found in specialized gaming models, intended for use with consoles as well. In these models, the mini-jack may be combined, allowing for the connection of both a line (analog) signal via a regular electrical wire and an optical (digital) signal via a TOSLINK cable. It is worth noting that the optical interface is notable for being completely immune to external interference; it allows for transmitting multi-channel sound, but cables for such connections require careful handling.

— Bluetooth. Wireless connection following the Bluetooth standard. It is mainly found in models intended for use with smartphones and tablets — these gadgets have few wired connectors, but Bluetooth modules are almost guaranteed to be present. However, initial sound transmission is highly compressed, noticeably affecting its quality; to remedy this drawback, modern Bluetooth sound cards usually support aptX. Of course, this technology must be supported by the signal source as well — make sure of this before purchasing.

Ability to work sound card with Mac computers.

Mac (Macintosh) in this case can be attributed to both the eponymous line of desktop computers manufactured by Apple and MacBook laptops. Both of them have certain hardware differences from "regular" PCs and laptops, in addition, they were originally created for Apple's own MacOS operating system. All this led to specific requirements for peripheral devices, including and sound cards — not all models are able to work normally with a Mac. Therefore, if you purchase a sound card for such a computer or laptop, you should make sure that Mac support is directly claimed for the selected model.

Note that Apple products have very limited possibilities for replacing internal peripherals by the user, and sound cards are not included in the list of replaceable components at all. Therefore, Mac-enabled models are usually referred to as external (see "Type").

The need to connect additional power to the sound card.

Most of both internal and external (see "Type") sound cards are powered directly through the connection connector (see "Connection interface"). At the same time, for normal operation of advanced models (for example, audiophile and gaming, as well as some DACs; see "View"), this power may not be enough, which requires an additional power source. In internal audio cards, it is carried out from the computer power supply, in external ones — directly from the 230 V network.

The dynamic range of a DAC is the ratio between the loudest sound that the converter can produce and the quietest. The wider the dynamic range — the richer the sound will be, the lower the likelihood that quiet sounds that complement the overall picture will be muffled during conversion. At the same time, it is worth noting that almost all modern sound cards provide a dynamic range that is quite sufficient for comfortable everyday use, and in many models this parameter may not be indicated at all. It is worth paying attention to it when choosing an advanced specialized audio card — for example, a gaming one (see "View"). The minimum for professional models is 90 dB, but in fact, among similar solutions, this figure is usually 120 dB or more.

This parameter determines the ratio of the "clean" sound produced by the DAC at the output to all extraneous noise. As such, it is a pretty strong indicator of sound purity. According to the signal-to-noise ratio, DACs in modern sound cards can be divided as follows:

up to 90 dB — initial level;
90-100 dB — average level, advanced "home" models;
more than 100 dB — professional level.

The dynamic range of an ADC is the ratio between the loudest and quietest sound that the converter is able to perceive and process. The larger this parameter, the more complete the picture of the sound converted to digital format will be, the less quiet details (which, nevertheless, affect the overall sound) will remain when digitizing “behind the scenes”. At the same time, we note that this parameter is critical only for professional recording, and therefore it is indicated in the characteristics quite rarely, usually only in models of the corresponding specialization (in particular, audio interfaces, see "View").

The number of outputs with 3.5 mm mini-Jack connectors in the design of the sound card. It is this connector that is used by the vast majority of modern computer headphones and speakers of all price categories (although it is relatively rare in top-end technology), and it is very popular in other consumer-class audio devices. Therefore, almost all entry-level and mid-level sound cards have at least one 3.5 mm jack; the absence of such outputs is typical for specialized models (for example, DAC, see "View"). Also note that a single mini-jack output can work with a maximum of two channels, however, this interface is also used in multi-channel sound systems — in this case, the audio card is equipped with several connectors, each of which is responsible for its own part of the system. For example, for 5.1 systems, one connector is allocated to the centre, one to a pair of front channels, one to a pair of rear channels, and one to a subwoofer.

As with 3.5mm inputs (see above), this type of output can be used in a variety of ways and can even be configurable.

The number of outputs with RCA connectors(colloquially known as "tulips") in the sound card design. Like the Jack and mini-Jack interfaces, RCA is designed to carry an analogue signal, however, only one channel can be transmitted on one cable. On the one hand, this improves the sound quality, on the other hand, two connectors are required to transmit a stereo signal instead of one. Therefore, RCA is practically not used in headphones and is very rare in "purely computer" speakers, but it is quite popular in home-class acoustic systems and can be useful if you are planning to build such a speaker based on a computer.

Separately, we note that this output should not be confused with coaxial S / P-DIF (see below): although the latter also uses an RCA jack, however, it is fundamentally different in signal format and has specific cable requirements.