Sound card

Sound card is a peripheral device that is mainly included in the main chipset of motherboards and provides the quality of recording and playback of audio information no worse than an audio CD. The sound card has standard outputs for connecting the computer's speaker system and external audio amplifiers, as well as stereo digital-analog and analog-digital converters for recording and reproducing sound information from digital or analog media and a microphone.

Sound card is a peripheral device that is mainly included in the main chipset of motherboards and provides the quality of recording and playback of audio information no worse than an audio CD

The sound card works in three basic modes: creation, recording and playback of audio signals. In the sound creation mode, the board acts as a musical instrument that synthesizes a complex sound signal. For synthesis, two methods are used: FM synthesis and WT synthesis. FM synthesis is carried out with the help of special generators, which can change the frequency and amplitude of the tone. These generators can simulate the sound of a specific musical instrument. On the sound card are installed from 4 to 18 generators, which, respectively, can simulate the simultaneous sound of 2-9 instruments. The sound synthesized by the FM method has some "metallic" tint and is not like the sound of a real musical instrument.

WT-synthesis provides a higher quality of sound. This synthesis is based on the previously recorded and stored in the form of files samples of the sound of musical instruments (MIDI files). WT synthesizers manipulate recorded samples, creating complex musical images. At the same time, high quality of synthesized sound is achieved, and the number and types of musical instruments can be expanded by installing additional MIDI files on the computer.

In the recording mode, the sound card digitizes the sound from an external source, converting it from an analog (continuous) form to a digital (discrete) one. The quality of digitized sound largely depends on the bit depth of the conversion and the sampling rate.

During playback, the sound card can receive a digitized or continuous signal. For this, the card has special connectors for connection of continuous signal sources and an amplifier that allows you to output the signal to external speakers.

The quality of the digitized and reproduced signal depends on the parameters of the sound card, such as the sampling frequency, which should be at least 44 kHz, the digitized digit (12-16 bit), and the possibility of stereo recording and playback.

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