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A cable conducts the sync pulse from camera to sound recorder. The sync pulse is typically a sine wave of 50 or 60 Hz with an RMS amplitude of approximately 1 volt. [4] This double-system audio recording could then be transferred or "resolved" to sprocketed magnetic film, with sprocket holes that match one to one with the original camera film.
The audio synchronizer receives the DDO signal and in response delays the audio by an equivalent amount, thereby maintaining proper audio-video sync. Modern audio synchronizers operate by digitizing and writing the audio signal into a ring memory, which is most commonly a RAM -based memory having independent read and write ability.
The device which generates the word clock is the clock source for all the other audio devices. The signal is used for synchronizing digital audio signals between devices, such as CD players, audio I/O cards, etc. [1] It allows all the components in the signal path to process the data and remain synchronized with each other. [2]
The AV-sync delay is normally fixed. External AV-sync errors can occur if a microphone is placed far away from the sound source, the audio will be out of sync because the speed of sound is much lower than the speed of light. If the sound source is 340 meters from the microphone, then the sound arrives approximately 1 second later than the light.
A click track is a series of audio cues used to synchronize sound recordings, sometimes for synchronization to a moving image.The click track originated in early sound movies, where optical marks were made on the film to indicate precise timings for musical accompaniment.
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MIDI beat clock, or simply MIDI clock, is a clock signal that is broadcast via MIDI to ensure that several MIDI-enabled devices such as a synthesizer or music sequencer stay in synchronization. Clock events are sent at a rate of 24 pulses per quarter note .
Synchronization of image and sound was an important technical problem in sound film. More sophisticated film, video, and audio applications use time code to synchronize audio and video. [2] In movie and television production it is necessary to synchronize video frames from multiple cameras.