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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. Subtract place values from the decimal number and place ones or zeros in the correct places
Sample Rate
Decimal- to-Binary Conversion
Blu-Ray
Dynamic Range
2. 15.9 GB; DS/DL
Exponent
Sample- and-Hold
DVD-18
Nyquist Frequency
3. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Requirements for CD Audio
Pulse Width Modulation
Digital Signal Processing
Compression
4. How Loud (Y-Axis) & How Fast (X-Axis)
2 Dimensions of Sound
Amplitude Accuracy
Motion Pictures Experts Group
Cutoff Frequency
5. Leaving space at beginning and ending of song for data crunching during mastering; Last step in mastering process
Pad Head & Tail
Footroom
Impulse Response
X-Axis Terminology
6. Electromagnetic receptor that detects the radiation known as visible light
Pad Head & Tail
Glass Master
Sinusoidal
Photoreceptor
7. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
dBFS
Buffering Locations
TOSLINK
CobraNet
8. 7.95 GB; SS/DL
Low-Latency Monitoring
Bit Depth Effect on Dynamic Range
Sonogram
DVD-9
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
Noise Shaping
Intensity Stereo
dB/FS
Sawtooth Wave
10. Perceptual coding technique that uses louder sounds of a similar frequency to decide what information is to be saved during data reduction
Masking Analysis...
Quantizer
Low-Latency Monitoring
Joseph Fourier
11. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
DVD-Audio
dB/SPL
Micron
Edit Decision List
12. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
SACD
Square Wave
Multichannel Audio Digital Interface (MADI)
Sampling (Samples)
13. The process of reducing the space required to store data by efficiently encoding the content.
DVD-10
Analog
Audio Engineering Society
Compression
14. Sample Rate x Bit Depth x # of Channels
Quantization
Entropy Coding
Non -Compressed Audio Data Rate Formula
Joint Stereo
15. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Direct Monitoring
Cutoff Frequency
Y-Axis Terminology
DVD-18
16. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital
Quantization Error
Dolby 5.1
Significand
Zero-Latency Monitoring
17. 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
DVD-18
Conversion Buffering
Anti-Aliasing Filter
Base 2 System
18. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission
Anti-Aliasing Filter
Buffer Size
Analog
Base 2 System
19. The frequency above or below which attenuation begins in a filter circuit
A/D Conversion
DVD-9
Redither
Cutoff Frequency
20. 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
Dithering
Coaxial
Low-Latency Monitoring
PCM
21. 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
Voltage
RMS Meter
Ethernet
Perceptual Coding
22. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Logical Format
Fourier Series
Playback Buffering
Quantization Intervals
23. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates
Delta-Sigma Modulation
Non -Compressed Audio Data Rate Formula
Red Book
Decimal- to-Binary Conversion
24. A frequency specified for a filter (digital or electronic) the marks the point at which the frequency content of a signal is altered +/- 3dB
Impulse Response
Variable Bit Rate
Cutoff Frequency
Quantization Error
25. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Sampling Rule
Variable Bit Rate
AoE Formats
0 dB FS
26. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Blu-Ray
Bit Rate
A/D Conversion Signal Flow
Ethernet
27. 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
Playback Buffering
2 Dimensions of Sound
Dithering
Speed of Sound
28. Same as 'aliasing'
Dolby 5.1
Foldover
Frames
Intensity Stereo
29. A digital filter's time domain output sequence when the input is a single sample is input
0 dB FS
D/A Conversion
Impulse Response
Masking Analysis...
30. Have odd numbered harmonics
Quantizer
Frames
Square Wave
Footroom
31. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
Jitter
Equal Loudness Contour
EtherSound
AoE Formats
32. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Edit Decision List
Index of Reflectivity
6 dB
EtherSound
33. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Index of Reflectivity
Pulse Code Modulation
Rarefaction
Joint Stereo
34. 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
Psychoacoustics
Successive Approximation
Lossy Formats
Jitter
35. Signal conversions are mixed with playback tracks resulting in near-zero latency
Direct Monitoring
Pass Band
Signal- to- Noise Ratio
dBFS
36. 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
Gain Staging
2 Dimensions of Sound
Dithering
Word Clock
37. The continuous loss of signal strengths as a signal travels through a medium
Frames
Attenuation
Sample Rate
Blu-Ray
38. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage
Edit Decision List
Quantizer
Square Wave
Compression
39. Allows for an internal sample rate at multiples of the input and output rates; Alleviates the need for steep 'brickwall' filters; Often combined with internal '1- bit' processing; Increases smoothing effect
Sample Rate Effect on Anti-Aliasing
Buffering
Oversampling
Index of Reflectivity
40. A method of representing real numbers using a mantissa and an exponent
DVD-14
Spectra
Floating Point
AES3
41. Take up half as many bits (50%); Algorithm can keep same quality by lossing the stereo track
2 Dimensions of Sound
Decimal- to-Binary Conversion
Low-Latency Monitoring
MONO
42. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size
Threshold of Pain
Requirements for A/D Conversion
Resolution
Codec
43. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Cutoff Frequency
Signal- to- Noise Ratio
Coaxial
Bit Depth
44. EBU
Significand
Pulse Code Modulation
Direct Monitoring
European Broadcasting Union
45. The set of rules that computers use to move files from one computer to another on an internet
Psychoacoustics
RMS
DVD-10
Transfer Protocol
46. Sum of all harmonics; Sum of sine and cosine waves which have frequencies f - 2f - 3f - 4f...
Entropy Coding
Average Bit Rate
Fourier Series
Buffer Size
47. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector
Lightpipe
Sampling Theorem
Digital
Analog
48. Allowance of noise floor below that which is required for the final product
Footroom
Headroom Bits
Direct Stream Digital
Anti-Aliasing Filter
49. 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
Psychoacoustics
Blu-Ray
Successive Approximation
Red Book
50. 4.38 GB; SS/SL
Y-Axis Terminology
dB/SPL
DVD-5
Ethernet