How the sound card is classified at different angles

The sound card has different classification methods according to different angles, which is briefly described below.

Sort by number of digits to the sound card

By the number of digits in the sound card, you can divide the sound card into 8-bit sound cards, 16-bit sound cards, quasi 16-bit sound cards and 32-bit sound cards. 8-bit sound card is the 咅 frequency signal size (咅 amount) into 256 levels (0~255), each level corresponds to a 8-bit binary number, in the voice input (sampling) when the maximum by the sound of a binary number, playback in accordance with the binary number to implement the restore; 16-bit sound card is the size of the audio signal into 65,536 levels (0~65535) and then implement the above conversion, it is obvious that the audio signal (volume size) description than 8-bit more accurate: 32-bit sound card has higher accuracy. In addition, the quasi 16-bit sound card essentially refers to a 8-bit plus 8-bit dual-channel stereo sound card.

Sort by function of sound card

By the function of the sound card, you can split the sound card into a mono sound card, a quasi stereo sound card and a stereo sound card. Mono sound card is the recording and playback of all sound sources can only be mono sound card; quasi-stereo sound card simply means that the recording is mono, playback is sometimes stereo, sometimes a mono sound card; a stereo sound card is a sound card that has a digital stereo recording/playback, replay game, and a stereo sound function in an application. Stereo sound card in the running of teaching and game programs, you can play the program in the music and harmony effect, good stereo sense, give a strong sense of the scene, more fully improve the effect of the program.

Sort by the way the sound card is implemented

With the sound card technology constantly improve and improve, especially the Intel Company's AC97 norms in the industry popularization and implementation, so that the sound card field formed in the form of card-independent hard sound card and integrated in line with the AC97 standard integrated sound of the two camps. Hard sound card is a card, and now the ordinary users are mostly integrated on the motherboard integrated sound card, integrated sound card can be divided into integrated hard sound card and integrated soft sound card.

At present, many boards integrated sound card is a soft sound card, its characteristic is omitted the Digitalcontrol chip, the cost is low. Integrated soft sound card only integrates a AUDIOCODEC chip for signal acquisition and coding, and the processing of sound 咅 is done by CPU, so the integrated soft sound card has a corresponding increase in CPU share. However, as the CPU functions more powerful and soft sound card technology progress, such products on the CPU dependence will gradually reduce, sound quality will gradually improve, to meet the needs of ordinary users.

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Integrated hard sound card has a complete digitalcontrol and Audiocodec chip, and the sound card is designed to be the same as a PCI sound card, except that the two chips are integrated into the motherboard 丨: just. Integrated hard sound card is the disadvantage of the audio letter 9 output Signal-to-noise is relatively low, and three-dimensional audio positioning ability is not very good, because of its low share of the CPU, so relative to the soft sound card costs naturally a little higher.