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Test your basic knowledge |
Digital Audio
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Used as the main disc from which other discs are made; Composed of ground glass with a very fine photoresistor layer; An imaging laser burns pit and land patterns in preparation for duplication
Glass Master
Quantization
A/D Conversion
Base 2 System
2. Industry Standards: -6 dB Peak = -20 RMS Meter
Joint Stereo
Recording Levels
Red Book
Digital
3. A method of representing real numbers using a mantissa and an exponent
Oversampling
6 dB
Floating Point
SCMS
4. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
DVD-9
Internal Resolution
PCM
AES3
5. The art of deciding where to place a processor in signal flow based on how that processor will be influenced by the other processors in the path
2 Dimensions of Sound
Interpolation Filter
Gain Staging
Inter-Channel Redundancy
6. Uses entropy coding as the basis; Computer data compression algorithm that packages files such as .ZIP & .RAR
Micron
SCMS
Data Packing
Glass Master
7. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
DVD-Audio
Sample Rate Effect on Anti-Aliasing
Inter-Channel Redundancy
Average Bit Rate
8. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Rarefaction
Adaptive Pulse Code Modulation
Successive Approximation
Requirements for CD Audio
9. 8.75 GB; DS/SL
DVD-10
Attenuation
Physical Disc Format
Fourier Series
10. Anytime bit depth is reduced the gap gets bigger so more dithering is required
Stapedes Reflex
Sampling Rule
Redither
Inter-Channel Redundancy
11. Reduces the percieved distortion due to quantization error; Low level white noise source is introduced to make the profile of the quantization 'noise' more irregular; Useful when reducing the number of bits per word in a signal (i.e. when converting
Interpolation Filter
Dithering
Nanometer
Buffering Locations
12. Cable used to transmit data; Inner cable is surrounded by a plastic insulator - which is surrounded by a wire mesh conductor that insulates the internal signal wire from external interference and an outer casing that functions as a ground
dB/SPL
Oversampling
Requirements for A/D Conversion
Coaxial
13. A digital filter's time domain output sequence when the input is a single sample is input
Noise Shaping
Impulse Response
Spectrum Multiplication
Threshold of Hearing
14. Amplitude meter that takes the square root of all instantaneous amplitudes and averages them to find a mean and squares that value; Useful with particularly complex waveforms
Square Wave
Morse Code
RMS Meter
Bit Depth
15. Data is transmitted over fiber optic lines; Uses a TOSLINK connecter instead of an RCA type; Can transmit multi- channel audio; Not susceptible to ground hum and loops; Able to support far higher rates of data transfer over greater distances than coa
Threshold of Hearing
Optical Cable
Attenuation
Normalizing
16. EBU
Floating Point
Coaxial
Quantization
European Broadcasting Union
17. Mixing data and control characters in a single operation
Interleaved
Lossy
Algorithm
Glass Master
18. 'Capturing' part of digital audio; Never captures a signal perfectly
DVD-5
Variable Bit Rate
A/D Conversion
Cutoff Frequency
19. A sample- by- sample operation on two signals
0 dB FS
X-Axis Terminology
Convolution
Lossy
20. Accuracy with which an electronic system reproduces the sound or image of its input signal
Zero-Latency Monitoring
Fidelity
Quantization
A/D Conversion
21. Measures the highest levels of a signal being recorded or mixed; Monitors for clipping - which occurs at 0dBFS); Does not always reflect perceived volume of signal
Subbands
Nyquist Frequency
Peak Level
Oscillation
22. MPEG; Standardizing body of audio coding
Motion Pictures Experts Group
Joint Stereo
A/D Conversion
Attenuation
23. Describes various optical disc characteristics including the size and shape of the disc - the size of pits - the speed at which the disc spins - and a multitude of aspects regarding the specifications of the player itself
Cutoff Frequency
Blu-Ray
Anti-Imaging Filter
Physical Disc Format
24. The process of reducing the space required to store data by efficiently encoding the content.
dB/FS
Oversampling
Compression
Conversion Buffering
25. Softest sound that can be heard by the average human ear (0 dB)
Audio Engineering Society
Spectra
Threshold of Hearing
Noise Shaping
26. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Logical Format
Aliasing
Index of Reflectivity
Intensity
27. Stores only one copy of a stereo signal and assigns it to both channels in order to save 50% of original bandwidth
Inter-Channel Redundancy
SACD
I/O Connection Buffering
Decimal- to-Binary Conversion
28. Unit of measurement that is equal to one millionth of a meter
Attenuation
Base 2 System
Micron
M-S Stereo
29. Difference in brightness between land and pit on a CD Physical Format
Effective Bit Depth
DVD-18
Index of Reflectivity
Rarefaction
30. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
Square Wave
Headroom Bits
Floating Point
CobraNet
31. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Buffering Locations
Signal- to- Noise Ratio
DVD-14
EtherSound
32. Take up half as many bits (50%); Algorithm can keep same quality by lossing the stereo track
Oscillation
MONO
Logical Format
Average Bit Rate
33. Roughly around 1 -130 ft/s
Speed of Sound
Harry Nyquist
Base 2 System
Sonogram
34. 8- in/8- out on one cable; 25- pin D- sub connector
Tascam Digital Interface Format (TDIF)
Analog
Fourier Series
Attenuation
35. Eight channel digital surround sound system by Dolby
Pulse Density Modulation
Delta-Sigma Modulation
Dolby 7.1
D/A Conversion Signal Flow
36. RAM holds in memory audio data before it is transferred to the memory controller; Certain amount of data is processed before large amounts of data are streamed to prevent latency
Sample- and-Hold
Buffering
DVD-14
Pulse Code Modulation
37. The frequency range that is allowed through a filter
Edit Decision List
Pass Band
European Broadcasting Union
Anti-Imaging Filter
38. Method used in digital recording and reproduction in which a signal is sampled at various points and the resulting value is translated into binary numbers
Successive Approximation
Adaptive Pulse Code Modulation
dBFS
Pulse Code Modulation
39. Only 2 digits used; The value of each place (ones - hundreds - etc.) are as follows from greatest to least: 128 - 64 - 32 - 16 - 8 - 4 - 2 - 1
Base 2 System
Edit Decision List
Convolution
D/A Conversion
40. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Nyquist Frequency
Decimal- to-Binary Conversion
Stapedes Reflex
Spectra
41. Built into DAWs; Bits are added when signals are mixed together to avoid clipping
Photoreceptor
Headroom Bits
Pulse Density Modulation
Harry Nyquist
42. The amount of energy at each wavelength
Spectra
Delta-Sigma Modulation
Pulse Code Modulation
Gain Staging
43. Digital (binary) measurements of how long each pulse is either on or off; Width of increasing voltage or decreasing voltage is assigned a 1 or 0 respectively
Sample Rate
Interpolation Filter
Index of Reflectivity
Pulse Width Modulation
44. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
Stapedes Reflex
Sinusoidal
Voltage
Y-Axis Terminology
45. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
Multichannel Audio Digital Interface (MADI)
I/O Connection Buffering
Signal- to- Noise Ratio
Photoreceptor
46. Increases or decreases the digital signal so that the loudest sample is brought up to 0dBfs; Uses all bits from dynamic range and makes it even from track to track
Audio over Ethernet (AoE)
Spectra
Normalizing
Oversampling
47. Governs the frequency response of a digital system; The highest- frequency component that can be captured with a sampling rate; always 1/2 of sampling rate; Also called the limiting frequency
Threshold of Hearing
Lossy Formats
TOSLINK
Nyquist Frequency
48. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Algorithm
Bit Rate
Blu-Ray
Logical Format
49. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Optical Cable
Fourier Series
Acoustics
Quantizer
50. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit
Physical Disc Format
X-Axis Terminology
SACD
Internal Resolution