This set of Audio Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Digital Audio Recorders and Editing”.
1. In analog recording, audio signals picked up by a microphone are converted into stream of discrete numbers.
a) True
b) False
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Explanation: In digital recording, audio signals picked up by a microphone are converted into stream of discrete numbers which represents the changes over time in air pressure of audio and then recorded to a storage device. To play back a digital sound recording, the numbers are retrieved and converted back into their original analog waveforms so that they can be heard through a loudspeaker.
2. In digital audio recorders the number of bytes used to represent a single audio wave directly affects the achievable noise level of signal recorded.
a) True
b) False
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Explanation: The number of bites used to represent a single audio wave (the word size) directly affects the achievable noise level of signal recorded. If there are more bits in the number, the waveform is more accurately traced, because each added bit doubles the number of possible values.
3. What should not be too low for the audio signal to be reconstructed to the original one in a digital recording system?
a) Amplitude
b) Phase
c) Frequency
d) Sample rate
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Explanation: The sample rate is another important consideration like word size. If the sample rate is too low then the signal cannot be reconstructed to the original signal. To overcome this problem the sampling should be done with the rate twice of the highest frequency component of the signal.
4. What is the full form of SMPTE?
a) Specially Evolved Motion Picture and Television Engineering
b) Scientifically Evolved Motion Picture and Television Engineering
c) Specially Evolved Motion Photos and Telephone Engineering
d) Scientifically Examined Moving Picture and Television Engineering
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Explanation: SMPTE stands for Specially Evolved Motion Picture and Television Engineering. The key to understand the relative function is simple with the basic idea of the Specially Evolved Motion Picture and Television Engineering time code as the means of both controlling the equipment during the editing operation and to store in its vast memory every edit decision as it is made by the editor or director.
Sanfoundry Global Education & Learning Series – Audio Video Engineering.
To practice all areas of Audio Video Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.
