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Sources for audio lesson two second year fourt quarter
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Sources for audio lesson two second year fourt quarter




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  • 1. Sources for Audio Sounds
  • 2. Where can sounds be found or made?
  • 3. Different Methods of Producing Sounds • Audio Recording and Reproduction • Ripping CD Tracks • Sounds from the Web
  • 4. Audio Recording and Reproduction • This involves the electrical and mechanical capturing and creation of sound waves with the use of different audio devices. • There are two main classes of audio recording. • Analog recording • Digital recording
  • 5. Analog recording • A method of storing audio and video signals as a continuous wave in the media for later playback. • In 1877, Thomas Alva Edison, the American inventor of the phonograph, successfully demonstrated the use of analog audio recording. • There are various ways of recording audio. • Gramophone or phonorgraph recording • Wire recording • Magnetic tape, Magnetic sound recording
  • 6. Gramophone or phonograph recording • It is a device created by, Emil Berliner in 1887 which was based on Edison’s original phonograph • It used a diaphragm directly controlling a needle, which scratches an analog signal into a tinyfoil cylinder. • This was then improved using flat records with a spiral groove, which resulted to a greater number of recorded outputs.
  • 7. Wire recording • Makes use of a thin steel or stainless steel wire for storing audio. • 1890s, the first wire recorder, the Valdermar Poulsen Telegraphone was made. • It was used as substitute for commercial office dictation recorders.
  • 8. Magnetic tape/Magnetic tape sound recording • Uses magnetic tape for storing audio • Consists of a thin, magnetisable coating on a long and narrow strip of plastic • Was initiated by Oberlin Smith in 1877 • Demonstrated in pactice in 1988 by Valdemar Poulsen.
  • 9. Digital recording • Handles analog sound and converts them to a stream of discrete numbers in a specific period of time • Developed by Max Mathews on Bell Telephone laboratories in 1957 • Other advancements in digital electronics and microchips led to the development of the first digital Pulse Code Modulation (PCM) audio recoder in 1967
  • 10. Recording Audio Using Windows Built In Accessories • Next Meeting