SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Removes high frequency images and noise and smoothes the stair case output coming from of the sample and hold circuit; Also called a SMOOTHING FILTER
Micron
Anti-Imaging Filter
Claude Shannon
Lossless Formats
2. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Requirements for CD Audio
Red Book
Interleaved
Buffering
3. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Pad Head & Tail
Tascam Digital Interface Format (TDIF)
Lossless Formats
Sample- and-Hold
4. Data transmission protocol over which computer network traffic travels; Poorly suited to real- time transmission but numerous attempts have been made to harness the technology because of its flexible routing; Uses simple Cat5 cabling; Resists interfe
Decoder
Exponent
Subbands
Audio over Ethernet (AoE)
5. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Bit Depth Effect on Dynamic Range
Sampling Rule
Latency
Convolution
6. EDL; Final list of samples used in the audio editing process; Identified by time code
Edit Decision List
Anti-Imaging Filter
X-Axis Terminology
Data Packing
7. 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
Sampling Theorem
Index of Reflectivity
Rarefaction
8. Psychoacoustic model of data reduction used for general audio compression that aims to transmit only features perceptible to the human ear; Useful for mastering streaming media
Significand
Bit Rate
Perceptual Coding
Zero-Latency Monitoring
9. Stores only one copy of a stereo signal and assigns it to both channels in order to save 50% of original bandwidth
Intensity Stereo
Inter-Channel Redundancy
Latency
Bit Depth
10. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
Blu-Ray
Fletcher- Munson Curve
Conversion Buffering
Photoreceptor
11. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating
Effective Bit Depth
Latency
Equal Loudness Contour
Lossy Formats
12. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
Pulse Width Modulation
Constant Bit Rate
Sony-Philips Digital Interface Format (S/PDIF)
Noise Shaping
13. 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
Spectrum Multiplication
Equal Loudness Contour
Headroom Bits
Pulse Code Modulation
14. The number of compressions or rarefactions in one second; The higher the frequency the more compressions & rarefactions per second; Measured in Hertz
Physical Disc Format
M-S Stereo
Frequency
Footroom
15. 'Capturing' part of digital audio; Never captures a signal perfectly
Constant Bit Rate
Psychoacoustics
A/D Conversion
AoE Formats
16. The continuous loss of signal strengths as a signal travels through a medium
Lossless
Jitter
Variable Bit Rate
Attenuation
17. The difference in volume between the loudest and quietest sounds of a source
Overflow
Speed of Sound
Word Clock
Dynamic Range
18. Eliminates frequencies above the Nyquist limit from becoming samples; Occurs prior to quantization
Additive Synthesis...
Constant Bit Rate
Threshold of Hearing
Anti-Aliasing Filter
19. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics
Impulse Response
Sampling Theorem
Additive Synthesis...
Quantization
20. French mathematician that noted that any complex sound can be broken down into a series of component pure tones
Joseph Fourier
Oversampling
Resolution
Edit Decision List
21. Roughly around 1 -130 ft/s
Morse Code
Footroom
Speed of Sound
Physical Disc Format
22. A drive that can read and write on optical media that hold up to 50 GB on two layers; 24- bit/96 kHz for 8-Channel; 24- bit/192 kHz for 6-Channel
Blu-Ray
CobraNet
Footroom
Sine Wave
23. 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
Harmonic Content
Dithering
Glass Master
Buffering Locations
24. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
Convolution
DVD-Audio
Requirements for A/D Conversion
Physical Disc Format
25. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC
Normalizing
Ethernet
Lossless Formats
Decimation Filter
26. Unit of measurement that is equal to one millionth of a meter
Acoustics
Pulse Density Modulation
Dolby 7.1
Micron
27. Same as 'aliasing'
Optical Cable
Adaptive Pulse Code Modulation
Algorithm
Foldover
28. Having a repeated succession of waves or curves as in a sound waveform
Peak Level
Sinusoidal
Threshold of Pain
Oversampling
29. 15.9 GB; DS/DL
Coaxial
Internal Resolution
DVD-18
Sawtooth Wave
30. A frequency specified for a filter (digital or electronic) the marks the point at which the frequency content of a signal is altered +/- 3dB
Speed of Sound
Cutoff Frequency
Peak Level
Sampling Rule
31. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Analog
Audio over Ethernet (AoE)
Pulse Code Modulation
Buffering Locations
32. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Lightpipe
Intensity
Cutoff Frequency
Bit Rate
33. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Joseph Fourier
Blu-Ray
AES3
Additive Synthesis...
34. Branch of psychology concerned with the subjective perception of sound
Sample Rate
Class - D Amplifier
Psychoacoustics
Buffering Locations
35. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel
SACD
Frequency
Y-Axis Terminology
dB/FS
36. The loudest point of a Full Scale system
Additive Synthesis...
0 dB FS
DVD-14
Lossless
37. Allowance of noise floor below that which is required for the final product
Red Book
Lossy
Bit Rate
Footroom
38. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude
DVD-9
Exponent
Psychoacoustics
Conversion Buffering
39. Used when the reference pressure of a sound is 20 microPa (0.00002); Sound Pressure Level; Measure of amplitude
dB/SPL
M-S Stereo
Nanometer
Frames
40. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Voltage
dBFS
Buffering
Stapedes Reflex
41. Each bit in the bit depth is equal to a _____ increase in dynamic range
Foldover
Requirements for A/D Conversion
6 dB
MONO
42. The amount of energy at each wavelength
Spectra
Analog
Resolution
EtherSound
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
Pulse Width Modulation
Micron
Buffering Locations
Quantization Error
44. Electromagnetic receptor that detects the radiation known as visible light
Sample- and-Hold
Motion Pictures Experts Group
Photoreceptor
Variable Bit Rate
45. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Entropy Coding
Jitter
Acoustics
D/A Conversion Signal Flow
46. Data reduction technique that does not effect quality of original audio; No effect on original quality; Typically around 50% reduction; Exact reconstruction of digital code for the audio signal
Nyquist Frequency
Amplitude Accuracy
Lossless
Constant Bit Rate
47. EBU
CobraNet
dBFS
European Broadcasting Union
AES3
48. 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
Additive Synthesis...
Coaxial
Frames
Base 2 System
49. 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
Joseph Fourier
Rarefaction
Intensity Stereo
CPU Buffering
50. A digital filter's time domain output sequence when the input is a single sample is input
Impulse Response
Psychoacoustics
Cutoff Frequency
Low-Latency Monitoring