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Test your basic knowledge |
Digital Audio
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Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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study here
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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. 7.95 GB; SS/DL
Voltage
MONO
DVD-9
Decimal- to-Binary Conversion
2. 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
Successive Approximation
Nanometer
Lossless Formats
Decimal- to-Binary Conversion
3. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Nyquist Frequency
Peak Level
Sampling (Samples)
Significand
4. The amount of energy at each wavelength
Edit Decision List
Blu-Ray
Spectra
Claude Shannon
5. The frequency above or below which attenuation begins in a filter circuit
Intensity
Lossless Formats
Cutoff Frequency
Oscillation
6. Anytime bit depth is reduced the gap gets bigger so more dithering is required
Intensity Stereo
Convolution
Redither
Audio Engineering Society
7. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Decimal- to-Binary Conversion
Gain Staging
Sample Rate
Dolby 5.1
8. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit
Harry Nyquist
Requirements for A/D Conversion
X-Axis Terminology
Lightpipe
9. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.
DVD-Audio
Average Bit Rate
Sample- and-Hold
Harry Nyquist
10. In order to play multiple channels at one time data is buffered as read to disk; Latency happens between play command & beginning of playback
Compression
AES3
Playback Buffering
Noise Shaping
11. More accuracy in low amplitudes and less in higher amplitudes
Bit Depth Effect on Dynamic Range
Amplitude Accuracy
Spectrum Multiplication
Sawtooth Wave
12. Reduces A/D sample rate from the oversampled rate to nominal rate by turning series of one- bit samples into a series of multi- bit PCM samples; (ex. => 2.8MHz sample rate converted to 44.1kHz and simultaneously converts 1-Bit samples to multi- bit);
RMS
Foldover
Decimation Filter
Tascam Digital Interface Format (TDIF)
13. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
DVD-18
Zero-Latency Monitoring
Sony-Philips Digital Interface Format (S/PDIF)
Nanometer
14. A sample- by- sample operation on two signals
D/A Conversion
I/O Connection Buffering
Convolution
Oversampling
15. 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
Perceptual Coding
Blu-Ray
DVD-14
Logical Format
16. Eliminates frequencies above the Nyquist limit from becoming samples; Occurs prior to quantization
Sinusoidal
Threshold of Hearing
Inter-Channel Redundancy
Anti-Aliasing Filter
17. 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
Attenuation
Index of Reflectivity
Glass Master
X-Axis Terminology
18. Branch of psychology concerned with the subjective perception of sound
Cutoff Frequency
Blu-Ray
I/O Connection Buffering
Psychoacoustics
19. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Threshold of Pain
CobraNet
0 dB FS
Quantization
20. 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
Zero-Latency Monitoring
DVD-9
European Broadcasting Union
Gain Staging
21. Industry Standards: -6 dB Peak = -20 RMS Meter
0 dB FS
Exponent
Noise Shaping
Recording Levels
22. Increases or decreases the digital signal so that the loudest sample is brought up to 0dBfs; Uses all bits from dynamic range and makes it even from track to track
Normalizing
CPU Buffering
Variable Bit Rate
Foldover
23. Very selective method of lowering buffer levels by halting different levels of audio processing
Low-Latency Monitoring
Convolution
Spectrum Multiplication
Anti-Imaging Filter
24. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Gain Staging
Decoder
Variable Bit Rate
Pulse Density Modulation
25. Same as 'aliasing'
DVD-Audio
Ethernet
Foldover
Oversampling
26. CobraNet; EtherSound; Dante; AVB (currently under development)
AoE Formats
Decimation Filter
Speed of Sound
Motion Pictures Experts Group
27. 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
Joseph Fourier
Blu-Ray
Peak Level
Red Book
28. Visual graph that shows how loud a sound is at different frequencies
Sonogram
Quantization
Photoreceptor
6 dB
29. A digital filter's time domain output sequence when the input is a single sample is input
Latency
Impulse Response
Quantization
RMS
30. 4.38 GB; SS/SL
DVD-5
Peak Level
Motion Pictures Experts Group
Edit Decision List
31. Level above which audible sounds are painful (125 - 130 db)
Oversampling
Threshold of Pain
Optical Cable
DVD-Audio
32. VBR; Most common & best data reduction technique; Codecs that encode data by determining how dense or sparse areas of the audio are; Can result in buffering issues
Oversampling
Variable Bit Rate
Floating Point
Glass Master
33. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Bit Depth
Joint Stereo
Buffering
Latency
34. Sum of all harmonics; Sum of sine and cosine waves which have frequencies f - 2f - 3f - 4f...
Low-Latency Monitoring
Gain Staging
Noise Shaping
Fourier Series
35. 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.
Non -Compressed Audio Data Rate Formula
Aliasing
Psychoacoustics
Storage Conversion Steps
36. Unit of measurement that is equal to one millionth of a meter
Fidelity
Transfer Protocol
Micron
Dithering
37. Low Pressure; Part in a longitudinal wave where the particles are spread apart
D/A Conversion Signal Flow
Pad Head & Tail
Gain Staging
Rarefaction
38. 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
MONO
Codec
Sample Rate Effect on Anti-Aliasing
PCM
39. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
Physical Disc Format
Voltage
Motion Pictures Experts Group
PCM
40. Data is transmitted over fiber optic lines; Uses a TOSLINK connecter instead of an RCA type; Can transmit multi- channel audio; Not susceptible to ground hum and loops; Able to support far higher rates of data transfer over greater distances than coa
Threshold of Hearing
Intensity Stereo
Optical Cable
Anti-Imaging Filter
41. Increases D/A sample rate from nominal rate to oversampling rate by turning series multi- bit PCM samples into 1- bit samples; (ex. => 44.1kHz sample rate converted to 2.8MHz and simultaneously converts multi- bit samples to 1- bit); Low Pass Filter
Harmonic Content
Interpolation Filter
D/A Conversion
AoE Formats
42. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Internal Resolution
Acoustics
Delta-Sigma Modulation
Signal- to- Noise Ratio
43. Have odd numbered harmonics
Direct Stream Digital
Square Wave
Resolution
Voltage
44. Subtract place values from the decimal number and place ones or zeros in the correct places
Adaptive Pulse Code Modulation
Decimal- to-Binary Conversion
Sampling (Samples)
0 dB FS
45. Uses entropy coding as the basis; Computer data compression algorithm that packages files such as .ZIP & .RAR
Gain Staging
Data Packing
Morse Code
Sony-Philips Digital Interface Format (S/PDIF)
46. Governs the frequency response of a digital system; The highest- frequency component that can be captured with a sampling rate; always 1/2 of sampling rate; Also called the limiting frequency
RMS
Perceptual Coding
Buffer Size
Nyquist Frequency
47. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
X-Axis Terminology
Digital Signal Processing
AES3
Sample Rate
48. Sample Rate x Bit Depth x # of Channels
Sonogram
Non -Compressed Audio Data Rate Formula
Sampling Theorem
European Broadcasting Union
49. The loudest point of a Full Scale system
Multichannel Audio Digital Interface (MADI)
0 dB FS
SCMS
Lossless Formats
50. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Successive Approximation
Fletcher- Munson Curve
Voltage
Sampling Rule
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