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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. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
Voltage
Sample- and-Hold
Multichannel Audio Digital Interface (MADI)
Sampling (Samples)
2. A time regulator that makes all samples and bits to align when working with interconnected digital devices; Basically a signal that all of the digital devices refer to when operating.
Intensity
Variable Bit Rate
Blu-Ray
Word Clock
3. Also known as equal loudness curves; Graph that indicates the average ear sensitivity to different frequencies at different SPL levels (as volume increases - these curves flatten out)
Threshold of Hearing
TOSLINK
Fletcher- Munson Curve
Sinusoidal
4. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
Equal Loudness Contour
Voltage
Audio Engineering Society
Nyquist Frequency
5. Mixing data and control characters in a single operation
Sampling (Samples)
Interleaved
Fourier Series
TOSLINK
6. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size
Pad Head & Tail
Adaptive Pulse Code Modulation
Pulse Code Modulation
Codec
7. The continuous loss of signal strengths as a signal travels through a medium
AoE Formats
Attenuation
Y-Axis Terminology
Edit Decision List
8. Level above which audible sounds are painful (125 - 130 db)
Threshold of Pain
Sinusoidal
Recording Levels
Decimation Filter
9. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
DVD-5
Spectrum Multiplication
Oversampling
Dolby 5.1
10. Channels are processed one at a time and the results are stored on multiple CPU buffers that alternately send data as DAW requests the data for playback; First few seconds are relayed to the buffer prior to processing and playback and it continuously
Nanometer
Fourier Series
AoE Formats
CPU Buffering
11. Multi-Bit Words; (Pulse Code Modulation)
PCM
A/D Conversion Signal Flow
Dolby 7.1
Pulse Width Modulation
12. Visual graph that shows how loud a sound is at different frequencies
Sonogram
Conversion Buffering
Word Clock
Aliasing
13. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!
Sample- and-Hold
AES3
Aliasing
Quantizer
14. 8- in/8- out on one cable; 25- pin D- sub connector
Tascam Digital Interface Format (TDIF)
Decimation Filter
Quantization Error
Inter-Channel Redundancy
15. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
Fourier Series
DVD-Audio
Y-Axis Terminology
Psychoacoustics
16. 'Reconstructing' part of digital audio
Joint Stereo
D/A Conversion
2 Dimensions of Sound
Bit Rate
17. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
Cutoff Frequency
Bit Rate
Conversion Buffering
dB/FS
18. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics
RMS Meter
Fidelity
Harmonic Content
Sonogram
19. Branch of psychology concerned with the subjective perception of sound
Voltage
Psychoacoustics
Amplitude Accuracy
Photoreceptor
20. Perceptual coding technique that uses louder sounds of a similar frequency to decide what information is to be saved during data reduction
0 dB FS
Masking Analysis...
Lossy
D/A Conversion
21. Increases D/A sample rate from nominal rate to oversampling rate by turning series multi- bit PCM samples into 1- bit samples; (ex. => 44.1kHz sample rate converted to 2.8MHz and simultaneously converts multi- bit samples to 1- bit); Low Pass Filter
Dithering
Interpolation Filter
Intensity
Additive Synthesis...
22. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Lossless Formats
Rarefaction
Psychoacoustics
Redither
23. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Base 2 System
Tascam Digital Interface Format (TDIF)
Interpolation Filter
EtherSound
24. 'Capturing' part of digital audio; Never captures a signal perfectly
Dolby 7.1
A/D Conversion
Equal Loudness Contour
Intensity Stereo
25. Serial Copy Management System; main difference between AES3 & S/PIDF
Y-Axis Terminology
Fidelity
SCMS
Noise Shaping
26. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Index of Reflectivity
Intensity Stereo
Red Book
Frames
27. How Loud (Y-Axis) & How Fast (X-Axis)
Interpolation Filter
Dolby 7.1
Direct Stream Digital
2 Dimensions of Sound
28. 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
Morse Code
Blu-Ray
DVD-Audio
Peak Level
29. 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
Harry Nyquist
Exponent
Transfer Protocol
30. Having a repeated succession of waves or curves as in a sound waveform
Sinusoidal
Perceptual Coding
Noise Shaping
Average Bit Rate
31. The frequency above or below which attenuation begins in a filter circuit
Micron
Cutoff Frequency
DVD-10
Sample Rate Effect on Anti-Aliasing
32. Joint-Stereo Technique; Since the human brain is unable to localize sounds at high frequencies well sounds above 9 kHz threshold are encoded in mono
Sampling (Samples)
Requirements for CD Audio
Intensity Stereo
Acoustics
33. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)
D/A Conversion
A/D Conversion Signal Flow
Bit Rate
Dynamic Range
34. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Decoder
AES3
6 dB
Buffering Locations
35. 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
Pulse Code Modulation
Dynamic Range
Amplitude Accuracy
Lossy
36. 7.95 GB; SS/DL
DVD-9
Conversion Buffering
Foldover
Bit Depth
37. As sample rate is increased more room is created for a smoother slope of the attenuation band because Nyquist limit extends well beyond range of hearing with each increase
Sampling Rule
Decoder
Sample Rate Effect on Anti-Aliasing
Overflow
38. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Threshold of Hearing
Interleaved
Decimal- to-Binary Conversion
Quantization Intervals
39. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Internal Resolution
Sampling (Samples)
RMS Meter
Sampling Rule
40. The process of reducing the space required to store data by efficiently encoding the content.
A/D Conversion
Square Wave
Quantization
Compression
41. A situation where a calculated value cannot fit into the number of digits reserved for it
Signal- to- Noise Ratio
Class - D Amplifier
Overflow
Index of Reflectivity
42. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Quantization
EtherSound
Edit Decision List
Glass Master
43. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude
Exponent
Buffer Size
Dithering
CPU Buffering
44. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
Buffering
Pass Band
RMS
CobraNet
45. French mathematician that noted that any complex sound can be broken down into a series of component pure tones
Speed of Sound
Micron
Multichannel Audio Digital Interface (MADI)
Joseph Fourier
46. Take up half as many bits (50%); Algorithm can keep same quality by lossing the stereo track
6 dB
Bit Depth
MONO
Footroom
47. Very quiet digital amplifier that produces a series of output pulses with the audio signal coded the same as the width of the output pulses; Pulses are used to represent wave forms and are either on or off; Intense signals have long pulses with short
Pad Head & Tail
Class - D Amplifier
Internal Resolution
Sine Wave
48. Data reduction technique that selectively removes original information in order to significantly reduce the file size; Some data is lost; Files can be reduced up to 99% in size (90% with no perceived sound quality loss); Bit rate effects the perceive
Playback Buffering
Delta-Sigma Modulation
Lossy
Logical Format
49. 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
Sampling Rule
Attenuation
Headroom Bits
Physical Disc Format
50. Have odd numbered harmonics
Harry Nyquist
Square Wave
Jitter
Equal Loudness Contour