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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
Zero-Latency Monitoring
Algorithm
A/D Conversion
Jitter
2. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Requirements for CD Audio
SCMS
Logical Format
Floating Point
3. 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
Coaxial
Peak Level
DVD-9
Quantization
4. CobraNet; EtherSound; Dante; AVB (currently under development)
AoE Formats
Attenuation
Photoreceptor
dB/SPL
5. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
CPU Buffering
Sample Rate
Variable Bit Rate
Pad Head & Tail
6. Ratio of magnitude of the analytical signal to the magnitude of the background noise signal
Psychoacoustics
Signal- to- Noise Ratio
Morse Code
CobraNet
7. 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
Sample- and-Hold
Digital Signal Processing
Buffering
8. Roughly around 1 -130 ft/s
Lossless Formats
Quantization Intervals
Speed of Sound
Bit Depth Effect on Dynamic Range
9. Waveform of a pure tone showing simple harmonic motion
Ethernet
Digital Signal Processing
Sine Wave
Cutoff Frequency
10. More accuracy in low amplitudes and less in higher amplitudes
Storage Conversion Steps
Spectrum Multiplication
Amplitude Accuracy
Joint Stereo
11. Decibels Full Scale
Subbands
Physical Disc Format
0 dB FS
dBFS
12. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Analog
Delta-Sigma Modulation
DVD-9
Compression
13. Multi-Bit Words; (Pulse Code Modulation)
dB/FS
MONO
DVD-10
PCM
14. Deviation from a normal - steady pulse or tick of a clock that contributes to misrepresentation of a signal; Result of small timing irregularities that become magnified during the transmission of digital signals as the signals are passed from one dev
AES3
Square Wave
Rarefaction
Jitter
15. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
Requirements for A/D Conversion
Anti-Aliasing Filter
Equal Loudness Contour
Quantizer
16. 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
SACD
Cutoff Frequency
Joint Stereo
17. Eight channel digital surround sound system by Dolby
AoE Formats
Dolby 7.1
Harmonic Content
Cutoff Frequency
18. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Compression
Quantizer
RMS Meter
Buffer Size
19. ADPCM; Pulse code modulation that produces a digital signal with a lower bit rate than standard PCM; Records only the difference between samples
Cutoff Frequency
Intensity Stereo
Spectra
Adaptive Pulse Code Modulation
20. AES
Headroom Bits
Audio Engineering Society
Signal- to- Noise Ratio
Decoder
21. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Acoustics
Floating Point
Sample Rate Effect on Anti-Aliasing
D/A Conversion
22. ABR; Codecs that encode data by determining how dense or sparse areas of the audio are while also keeping bit rate within specified limits to avoid rebuffering
Joint Stereo
Average Bit Rate
Successive Approximation
Blu-Ray
23. A digital filter's time domain output sequence when the input is a single sample is input
Additive Synthesis...
Pass Band
Frames
Impulse Response
24. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Blu-Ray
Inter-Channel Redundancy
Audio Engineering Society
Digital
25. The more bits allocated during quantization - the more accurate the measurement
Low-Latency Monitoring
Oversampling
Index of Reflectivity
Bit Depth Effect on Dynamic Range
26. Sony sigma- delta modulation based technology that bypasses the decimation and interpolation steps found in PCM converters
Direct Stream Digital
Interleaved
Joint Stereo
dB/FS
27. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating
Effective Bit Depth
Additive Synthesis...
Bit Rate
Signal- to- Noise Ratio
28. Leaving space at beginning and ending of song for data crunching during mastering; Last step in mastering process
Bit Depth
Pad Head & Tail
Physical Disc Format
Storage Conversion Steps
29. EDL; Final list of samples used in the audio editing process; Identified by time code
Edit Decision List
PCM
Sine Wave
M-S Stereo
30. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel
SACD
Signal- to- Noise Ratio
Physical Disc Format
Fidelity
31. 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
SCMS
Bit Depth Effect on Dynamic Range
DVD-18
32. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Sample- and-Hold
Jitter
Variable Bit Rate
Bit Depth Effect on Dynamic Range
33. Allowance of noise floor below that which is required for the final product
Codec
Index of Reflectivity
Footroom
Additive Synthesis...
34. Root Mean Square; Refers to taking the square root of all instantaneous amplitudes; Takes the average of those squares; (-6 Peak Level is approximately equal to -20 RMS)
Square Wave
Bit Depth
RMS
Lossy Formats
35. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Foldover
EtherSound
Data Packing
Transfer Protocol
36. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Convolution
Joint Stereo
Compression
Foldover
37. A situation where a calculated value cannot fit into the number of digits reserved for it
Anti-Aliasing Filter
Data Packing
Overflow
Compression
38. The process of reducing the space required to store data by efficiently encoding the content.
Compression
Glass Master
Data Packing
Requirements for CD Audio
39. Level above which audible sounds are painful (125 - 130 db)
DVD-9
Threshold of Pain
Sampling (Samples)
Coaxial
40. MPEG; Standardizing body of audio coding
Quantization Intervals
Motion Pictures Experts Group
Dithering
Cutoff Frequency
41. Same as 'aliasing'
X-Axis Terminology
Audio over Ethernet (AoE)
Foldover
Peak Level
42. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
6 dB
Codec
Digital
Morse Code
43. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
EtherSound
Variable Bit Rate
I/O Connection Buffering
Sonogram
44. Softest sound that can be heard by the average human ear (0 dB)
Buffering Locations
Analog
Speed of Sound
Threshold of Hearing
45. Serial Copy Management System; main difference between AES3 & S/PIDF
Sinusoidal
Tascam Digital Interface Format (TDIF)
SCMS
AES3
46. Full Scale; Type of metering that measures level in digital recording system; Recording and Mixing levels should NEVER exceed 0dB FS in digital audio or clipping will occur
dB/FS
Sonogram
Spectra
Variable Bit Rate
47. Digital Word -> Series of Resistors (each with assigned charges) -> Sample- and-Hold Circuit -> Anti-Imaging Filter (Smoothing Filter) -> Reconstructed Sample
Class - D Amplifier
D/A Conversion Signal Flow
Average Bit Rate
dBFS
48. Unit of measurement that is equal to one billionth of a meter
Nanometer
M-S Stereo
Motion Pictures Experts Group
TOSLINK
49. 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
Lossy
Claude Shannon
Anti-Imaging Filter
Latency
50. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
DVD-Audio
Sonogram
Quantization Intervals
Sawtooth Wave
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