1, digital sound file. Through the control of sound cards and corresponding drivers, signals from sound sources such as microphones and tape recorders are collected, compressed and stored in the memory or hard disk of the computer system.
2. The digitized sound file compressed by the laser disc is restored to a high-quality sound signal, which is amplified and then released through the speaker.
3. Digitized sound files are processed to achieve specific audio effects.
4. Volume, combined with various sound sources to realize the function of reverberator.
5, synthesis technology, through the sound card to read text information. For example, reading English words and sentences and playing music.
6, audio recognition function, let the operator command the computer with a password.
7. Electronic musical instruments. In addition, the sound card can output the files stored in MIDI format to the corresponding electronic musical instruments and make corresponding sounds under the action of the driver. Make electronic musical instruments under the command of sound card.
Extended data:
principle of operation
The sound card obtains the sound analog signal from the microphone, converts the sound amplitude signal into a series of digital signals through the analog-to-digital converter (ADC), and stores them in the computer. During playback, these digital signals are sent to a digital-to-analog converter (DAC), which is restored to an analog waveform at the same sampling speed, and then amplified and sent to a speaker to generate sound. This technique is called pulse code modulation (PCM).
Baidu encyclopedia-sound card