Different Methods of Producing Sounds
• Audio Recording and Reproduction
• Ripping CD Tracks
• Sounds from the Web
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
• 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
• There are various ways of recording audio.
• Gramophone or phonorgraph recording
• Wire recording
• Magnetic tape, Magnetic sound recording
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.
• Makes use of a thin steel or stainless steel wire for storing audio.
• 1890s, the first wire recorder, the Valdermar Poulsen Telegraphone
• It was used as substitute for commercial office dictation
Magnetic tape/Magnetic tape sound recording
• Uses magnetic tape for storing audio
• Consists of a thin, magnetisable coating on a long and narrow strip
• Was initiated by Oberlin Smith in 1877
• Demonstrated in pactice in 1988 by Valdemar Poulsen.
• 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
Recording Audio Using Windows Built In
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