Online Voice Recorder New Tools
Long before sound was first recorded, music was recorded—first by written music notation, then also by mechanical devices (e.g., wind-up music boxes, during which a mechanism turns a spindle, which plucks metal tines, thus reproducing a melody). Automatic music reproduction traces back as far because the 9th century, when the Banū Mūsā brothers invented the earliest known mechanical instrument, during this case, a hydropowered (water-powered) organ that played interchangeable cylinders. consistent with Charles B. Fowler, this "...cylinder with raised pins on the surface remained the essential device to supply and reproduce music mechanically until the last half of the nineteenth century." The Banū Mūsā brothers also invented an automatic flautist, which appears to possess been the primary programmable machine.
Sound recording and reproduction is an electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, like spoken voice, singing, music, or sound effects. the 2 main classes of audio recording technology are analogue recording and digital recording.
Acoustic analogue recording is achieved by a microphone diaphragm that senses changes in air pressure caused by acoustic sound waves and records them as a mechanical representation of the sound waves on a medium like a phonograph recording (in which a stylus cuts grooves on a record). In mag tape recording, the sound waves vibrate the microphone diaphragm and are converted into a varying current, which is then converted to a varying magnetic flux by an electromagnet, which makes a representation of the sound as magnetized areas on a plastic tape with a magnetic coating thereon. Analogue reproduction is that the reverse process, with a much bigger loudspeaker diaphragm causing changes to air pressure to make acoustic sound waves.
Digital recording and reproduction converts the analogue sound signal picked up by the microphone to a digital form by the method of sampling. This lets the audio data be stored and transmitted by a wider sort of media. Digital recording stores audio as a series of binary numbers (zeros and ones) representing samples of the amplitude of the audio signal at equal time intervals, at a sample rate high enough to convey all sounds capable of being heard. A digital audio signal must be reconverted to analogue form during playback before it's amplified and connected to a loudspeaker to supply sound.
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Prior to the event of audio recording, there have been mechanical systems, like wind-up music boxes and, later, player pianos, for encoding and reproducing music.
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Acoustic analogue recording is achieved by a microphone diaphragm that senses changes in air pressure caused by acoustic sound waves and records them as a mechanical representation of the sound waves on a medium like a phonograph recording (in which a stylus cuts grooves on a record). In mag tape recording, the sound waves vibrate the microphone diaphragm and are converted into a varying current, which is then converted to a varying magnetic flux by an electromagnet, which makes a representation of the sound as magnetized areas on a plastic tape with a magnetic coating thereon. Analogue reproduction is that the reverse process, with a much bigger loudspeaker diaphragm causing changes to air pressure to make acoustic sound waves.
Digital recording and reproduction converts the analogue sound signal picked up by the microphone to a digital form by the method of sampling. This lets the audio data be stored and transmitted by a wider sort of media. Digital recording stores audio as a series of binary numbers (zeros and ones) representing samples of the amplitude of the audio signal at equal time intervals, at a sample rate high enough to convey all sounds capable of being heard. A digital audio signal must be reconverted to analogue form during playback before it's amplified and connected to a loudspeaker to supply sound.
https://www.waltzwiththedevilrpg.com/the-next-generation-audio-camera-in-the-form-of-little-electronic-style-recorders/
Prior to the event of audio recording, there have been mechanical systems, like wind-up music boxes and, later, player pianos, for encoding and reproducing music.
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