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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. EDL; Final list of samples used in the audio editing process; Identified by time code
Quantization Error
Equal Loudness Contour
Pulse Density Modulation
Edit Decision List
2. AAC (Advanced Audio Coding); MP3; RA; WMA; OGG Vorbis; Dolby Digital/AC-3; DTS; ADPCM
Intensity Stereo
Lossy Formats
Bit Rate
Physical Disc Format
3. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
MONO
DVD-10
Conversion Buffering
Coaxial
4. Eight channel digital surround sound system by Dolby
Intensity
Redither
Optical Cable
Dolby 7.1
5. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
CobraNet
Dolby 5.1
Latency
Zero-Latency Monitoring
6. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Buffer Size
Stapedes Reflex
Joint Stereo
Intensity
7. The amount of energy at each wavelength
Spectra
Perceptual Coding
Effective Bit Depth
Dithering
8. MPEG; Standardizing body of audio coding
Motion Pictures Experts Group
Oversampling
Compression
Joseph Fourier
9. 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
Adaptive Pulse Code Modulation
Playback Buffering
Intensity Stereo
D/A Conversion Signal Flow
10. Branch of psychology concerned with the subjective perception of sound
Psychoacoustics
AES3
MONO
Normalizing
11. Algorithm uses matrix of a mid/side microphone pair to determine a side signal & that signal is reduced then distributed as code in stereo
Zero-Latency Monitoring
M-S Stereo
Playback Buffering
Tascam Digital Interface Format (TDIF)
12. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating
Effective Bit Depth
Buffer Size
Harmonic Content
Footroom
13. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Additive Synthesis...
PCM
Sample- and-Hold
Perceptual Coding
14. EBU
European Broadcasting Union
EtherSound
Sample Rate Effect on Anti-Aliasing
Lossy Formats
15. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Quantization Error
Logical Format
Word Clock
Frequency
16. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Cutoff Frequency
Interleaved
Significand
Quantization
17. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
DVD-14
dB/FS
Bit Depth Effect on Dynamic Range
Internal Resolution
18. Based on psychoacoustics - these are the basis of frequency analysis for a perceptual codec;
Subbands
Ethernet
TOSLINK
Compression
19. 4.38 GB; SS/SL
Anti-Aliasing Filter
DVD-5
0 dB FS
Fletcher- Munson Curve
20. The difference in volume between the loudest and quietest sounds of a source
Aliasing
Direct Monitoring
Dynamic Range
Interpolation Filter
21. 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
Overflow
Low-Latency Monitoring
RMS Meter
Subbands
22. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Claude Shannon
Cutoff Frequency
Spectra
Quantization Intervals
23. A sample- by- sample operation on two signals
Buffering Locations
Adaptive Pulse Code Modulation
Convolution
Digital Signal Processing
24. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital
Low-Latency Monitoring
D/A Conversion
Quantization Error
Compression
25. A method of representing real numbers using a mantissa and an exponent
AES3
M-S Stereo
Floating Point
A/D Conversion
26. In order to play multiple channels at one time data is buffered as read to disk; Latency happens between play command & beginning of playback
Pulse Code Modulation
Recording Levels
Harmonic Content
Playback Buffering
27. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Buffering Locations
Conversion Buffering
Frequency
Rarefaction
28. If a signal is sampled at a rate higher than twice the highest significant signal frequency and at evenly spaced intervals - then the samples contain all the information of the original signal
Lossy Formats
Convolution
Sampling Theorem
Audio Engineering Society
29. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit
X-Axis Terminology
Y-Axis Terminology
Playback Buffering
Transfer Protocol
30. 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
EtherSound
Interleaved
Gain Staging
Cutoff Frequency
31. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
Blu-Ray
Codec
AoE Formats
Sample Rate
32. Industry Standards: -6 dB Peak = -20 RMS Meter
Red Book
TOSLINK
Recording Levels
Lightpipe
33. 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
SCMS
Voltage
Physical Disc Format
A/D Conversion Signal Flow
34. Measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form); There must be a minimum of 2 samples for each cycle in a waveform
Direct Monitoring
PCM
Gain Staging
Sampling (Samples)
35. A network communications protocol that specifies how machines will exchange data; Uses a broadcast system in which one machine transmits its message on the communication medium and the other machines listen for messages directed to them
M-S Stereo
0 dB FS
Gain Staging
Ethernet
36. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Analog
Harry Nyquist
Rarefaction
Quantizer
37. Unit of measurement that is equal to one millionth of a meter
MONO
Base 2 System
Lightpipe
Micron
38. The process of reducing the space required to store data by efficiently encoding the content.
Bit Depth Effect on Dynamic Range
Decimation Filter
Compression
Threshold of Pain
39. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Red Book
2 Dimensions of Sound
Multichannel Audio Digital Interface (MADI)
Buffering
40. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!
D/A Conversion Signal Flow
Sine Wave
Peak Level
AES3
41. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
Oscillation
Nanometer
Amplitude Accuracy
Inter-Channel Redundancy
42. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
Claude Shannon
Exponent
Masking Analysis...
I/O Connection Buffering
43. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Bit Rate
Joint Stereo
Foldover
Decimation Filter
44. Multi-Bit Words; (Pulse Code Modulation)
AES3
Lossless Formats
Attenuation
PCM
45. Ratio of magnitude of the analytical signal to the magnitude of the background noise signal
Dolby 5.1
Direct Monitoring
Signal- to- Noise Ratio
Multichannel Audio Digital Interface (MADI)
46. 7.95 GB; SS/DL
DVD-18
RMS Meter
DVD-9
Lossy
47. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Internal Resolution
Bit Depth
Low-Latency Monitoring
Redither
48. 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
Recording Levels
Pulse Density Modulation
Sinusoidal
49. Used when the reference pressure of a sound is 20 microPa (0.00002); Sound Pressure Level; Measure of amplitude
Normalizing
dB/SPL
Harry Nyquist
2 Dimensions of Sound
50. 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
Foldover
Nanometer
Significand
Lossy
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