What's Sound Card Used For? > 자유게시판

• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

­Before the invention of the sound card, a Computer might make one sound - a beep. Although the computer could change the beep's frequency and duration, it could not change the amount or create different sounds. At first, the beep acted primarily as a sign or a warning. Later, builders created music for the earliest Laptop video games utilizing beeps of various pitches and lengths. This music was not particularly lifelike -- you possibly can hear samples from some of these soundtracks at Crossfire Designs. Now, a computer with a sound card can do far more than just beep. It may possibly produce 3-D audio for games or surround sound playback for DVDs. It also can seize and record sound from exterior sources. ­ In this article, you may learn how a sound card allows a pc to create and file real, high-high quality sound. Sounds and computer data are essentially totally different. Sounds are analog - they're made from waves that travel by matter.

Individuals hear sounds when these waves physically vibrate their eardrums. Computer systems, nonetheless, talk digitally, using electrical impulses that represent 0s and 1s. Like a graphics card, a sound card translates between a pc's digital info and the outside world's analog information. Sound is manufactured from waves that journey by way of a medium, akin to air or water. In the following section, we'll discover the analog-to-digital and digital-to-analog conversions that happen on the sound card. One in every of the latest advances in sound card technology is , or Xtreme Fidelity, from SoundBlaster manufacturer Creative. ExtremeTech has a comprehensive article detailing 's features. First, you communicate into a microphone that you've plugged into your sound card. The ADC interprets the analog waves of your voice into digital data that the computer can understand. To do that, it samples, or digitizes, the sound by taking exact measurements of the wave at frequent intervals.

The variety of measurements per second, called the sampling charge, is measured in kHz. The faster a card's sampling rate, Memory Wave Audio the extra accurate its reconstructed wave is. With accurate measurements and a fast sampling price, the restored analog signal could be practically equivalent to the original sound wave. Even excessive sampling charges, nevertheless, trigger some discount in sound quality. The bodily technique of shifting sound by means of wires can even cause distortion. For both THD and SNR, smaller values point out better high quality. Some cards also support digital input, allowing folks to store digital recordings without changing them to an analog format. Subsequent, we'll take a look at the opposite components commonly discovered on sound playing cards and what they do. Computers and sound playing cards can use a number of methods to create sounds. One is frequency modulation (FM) synthesis, through which the pc overlaps a number of sound waves to make extra complicated wave shapes. Another is wave table synthesis, which makes use of samples of real devices to replicate musical sounds.

Wave desk synthesis usually uses several samples of the same instrument played at totally different pitches to provide more life like sounds. Typically, wave desk synthesis creates extra accurate reproductions of sound than FM synthesis. It takes some of the workload off of the pc's CPU by performing calculations for analog and digital conversion. DSPs can process a number of sounds, or channels, simultaneously. Sound playing cards that wouldn't have their very own DSP use the CPU for processing. Memory Wave Audio: As with a graphics card, a sound card can use its personal memory to offer sooner knowledge processing. Input and Output Connections: Most sound cards have, at the very minimal, connections for a microphone and speakers. Some embrace so many input and output connections that they've a breakout field, which regularly mounts in one of the drive bays, to house them. It makes use of both coaxial or optical connections for input to and output from the sound card. Musical Instrument Digital Interface (MIDI), used to attach synthesizers or other electronic devices to their computer systems.