SOUND RECORDING BY Martin miralles facs 2930 SOUND
SOUND RECORDING BY: Martin miralles facs 2930
SOUND • (Sound) waves are made due to vibrating air molecules • These waves enter our ears and our brain translates to us what we hear • Sound can be caused by anything
SOUND RECORDING • The re-creating of sound waves as a physical or digitized form • The processes are modelled after the human ear • The recorded sound vibrates our ears similar to how the original sound did
Analog recordings • Early ways of recording • Changes in air pressure are recorded on a physical medium
cylinder phonograph • • One of the earliest sound recording devices Ability to store music and playback Invented by thomas edison (1877) Sound were contained on cylinders, the dominant medium until about 1910 • Helped grow the commercial recording industry • A microphone diaphragm detects changes in sound waves and records them as a scratched lines on the cylinder
Recording Discs • Represented sounds as shaped grooves on the disc, as the needle scratched over it • Discs were easier to make and were louder • Eventually made more sales than cylinders by 1910 • the improved vinyl microgroove records were introduced by 1940’s less brittle and better performance • How the discs were made: http: //www. recordinghistory. org/HTML/making_records. php
Magnetic tape • Sound recorded as magnetized areas on the tape, proportional to the sound signals • Allowed for sound to be erased and recorded on the same tape • Tape was edited by actually cutting the tape and rejoining it • Allowed the radio industry to pre-record parts of their program, which were all previously live
Digital Recordings • stores audio as digital information (Stream of numbers) • The numbers represent the changes in air pressure • A response to deteriorating physical memory • Allowed for easier sound editing, via computers
Compact discs • Originally for sound storage - now able to store all kinds of data • Small size, inexpensive material, and was rewritable • A laser would read the disc, and would reflect back as electronic data • Led to discs being able to represent visual data: Dvd’s and blu-ray discs
microphones • Its Diaphragm creates an electronic representation of the vibrations caused by sound waves • Present in many aspects of digital recording • Comes in many forms • Video: http: //science. discovery. com/videos/deconstructed-how-domicrophones-work. html
Why we record sounds?
recording spoken words
. . even when we’re not there
Educational purposes
artistic recreating of sounds
Music
Capital gain
sources • http: //www. recording-history. org/index. php • http: //science. discovery. com/videos/deconstructed-how-domicrophones-work. html • http: //en. wikipedia. org/wiki/Sound_recording_and_reproduction
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