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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. 'Capturing' part of digital audio; Never captures a signal perfectly
Frames
Ethernet
RMS Meter
A/D Conversion
2. Softest sound that can be heard by the average human ear (0 dB)
Digital
Threshold of Hearing
Successive Approximation
Dolby 7.1
3. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Resolution
Bit Depth
Nanometer
Storage Conversion Steps
4. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector
Nyquist Frequency
Spectrum Multiplication
Lightpipe
Requirements for A/D Conversion
5. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Convolution
Sampling Rule
Audio Engineering Society
Additive Synthesis...
6. The difference in volume between the loudest and quietest sounds of a source
Base 2 System
CPU Buffering
Zero-Latency Monitoring
Dynamic Range
7. 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
Threshold of Pain
CPU Buffering
Convolution
Tascam Digital Interface Format (TDIF)
8. Each bit in the bit depth is equal to a _____ increase in dynamic range
Nanometer
6 dB
I/O Connection Buffering
Recording Levels
9. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Compression
D/A Conversion
Digital
Dynamic Range
10. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Buffering
Sampling (Samples)
Buffering Locations
DVD-Audio
11. The frequency range that is allowed through a filter
Pass Band
Cutoff Frequency
Jitter
Interpolation Filter
12. Samples are duplicated and the playback sampling rate correspondingly increased; Significantly raises the Nyquist limit to a range well beyond human hearing; Processing 'pushes' the distortion resulting from quantization error into these higher frequ
Word Clock
Digital
Noise Shaping
Quantization Intervals
13. Anytime bit depth is reduced the gap gets bigger so more dithering is required
Redither
Red Book
DVD-18
Amplitude Accuracy
14. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel
SACD
6 dB
AES3
Edit Decision List
15. 1.) Taking a series of evenly- spaced measurements 2.) Signal contains no frequency components higher than half the sample rate
Requirements for A/D Conversion
Audio Engineering Society
SCMS
Sample Rate
16. EBU
Amplitude Accuracy
0 dB FS
Quantization Error
European Broadcasting Union
17. Improper (false) sampling of high frequencies that cause much lower frequencies to be produced when the audio is reconstructed; Foldover happens at higher frequencies as harmonics reach levels that exceed the Nyquist limit.
Adaptive Pulse Code Modulation
Aliasing
6 dB
Acoustics
18. Signal voltage is relayed to a register from sample- and - hold circuit; Holds reference frequencies in binary form that decrease in value; Finds approximated value & assigns binary number accordingly
Additive Synthesis...
Successive Approximation
Sample- and-Hold
Sample Rate Effect on Anti-Aliasing
19. 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
Lossless
Buffering
Normalizing
Additive Synthesis...
20. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Noise Shaping
Decoder
Playback Buffering
Index of Reflectivity
21. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)
A/D Conversion Signal Flow
Interleaved
Joint Stereo
Data Packing
22. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
Lossy
Nyquist Frequency
Sony-Philips Digital Interface Format (S/PDIF)
Sample- and-Hold
23. Based on psychoacoustics - these are the basis of frequency analysis for a perceptual codec;
Buffering
Footroom
Subbands
Inter-Channel Redundancy
24. 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
Peak Level
Gain Staging
Pad Head & Tail
Optical Cable
25. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
DVD-5
Non -Compressed Audio Data Rate Formula
Sine Wave
Logical Format
26. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
I/O Connection Buffering
Lossless Formats
Amplitude Accuracy
Coaxial
27. 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
Joint Stereo
Sample Rate Effect on Anti-Aliasing
Glass Master
Sample- and-Hold
28. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Dolby 7.1
Nanometer
Blu-Ray
Attenuation
29. Series of dots and dashes representing the letters of the alphabet; Most common letters are represented by the shortest dots and dashes; Example of entropy coding
DVD-14
AoE Formats
D/A Conversion
Morse Code
30. 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
Oscillation
Sinusoidal
CobraNet
Base 2 System
31. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
Voltage
Sawtooth Wave
Sample- and-Hold
Pulse Code Modulation
32. Multi-Bit Words; (Pulse Code Modulation)
DVD-14
Decimal- to-Binary Conversion
Y-Axis Terminology
PCM
33. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit
A/D Conversion
X-Axis Terminology
Bit Rate
Cutoff Frequency
34. Serial Copy Management System; main difference between AES3 & S/PIDF
SCMS
Sawtooth Wave
Decoder
Decimal- to-Binary Conversion
35. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Nanometer
Digital Signal Processing
Optical Cable
Cutoff Frequency
36. 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.
Playback Buffering
Word Clock
Subbands
Effective Bit Depth
37. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.
Harry Nyquist
Audio over Ethernet (AoE)
RMS
dB/FS
38. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
Sawtooth Wave
Exponent
Gain Staging
CobraNet
39. Decibels Full Scale
Analog
dBFS
Conversion Buffering
Quantizer
40. Signal conversions are mixed with playback tracks resulting in near-zero latency
Voltage
Direct Monitoring
Data Packing
Y-Axis Terminology
41. Allowance of noise floor below that which is required for the final product
Audio Engineering Society
DVD-10
Lossless
Footroom
42. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Aliasing
Inter-Channel Redundancy
Rarefaction
Headroom Bits
43. 7.95 GB; SS/DL
DVD-9
Adaptive Pulse Code Modulation
Latency
Cutoff Frequency
44. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Anti-Imaging Filter
Quantization
Aliasing
Oversampling
45. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
Sample Rate
Sample- and-Hold
Conversion Buffering
Edit Decision List
46. Mixing data and control characters in a single operation
Stapedes Reflex
Sawtooth Wave
Interleaved
Lightpipe
47. Same as 'aliasing'
Successive Approximation
PCM
Foldover
Oscillation
48. A situation where a calculated value cannot fit into the number of digits reserved for it
Motion Pictures Experts Group
Sampling (Samples)
Overflow
Subbands
49. Eight channel digital surround sound system by Dolby
Jitter
I/O Connection Buffering
Dolby 7.1
Compression
50. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Dolby 5.1
Edit Decision List
Compression
Logical Format