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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. 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
Peak Level
Requirements for A/D Conversion
Requirements for CD Audio
Audio over Ethernet (AoE)
2. More accuracy in low amplitudes and less in higher amplitudes
Amplitude Accuracy
Latency
Physical Disc Format
Dolby 5.1
3. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
EtherSound
Sonogram
dB/SPL
Oscillation
4. Perceptual coding technique that uses louder sounds of a similar frequency to decide what information is to be saved during data reduction
Masking Analysis...
Fidelity
Ethernet
Transfer Protocol
5. A frequency specified for a filter (digital or electronic) the marks the point at which the frequency content of a signal is altered +/- 3dB
Non -Compressed Audio Data Rate Formula
Dolby 7.1
Compression
Cutoff Frequency
6. 8- in/8- out on one cable; 25- pin D- sub connector
Sonogram
Psychoacoustics
Tascam Digital Interface Format (TDIF)
Overflow
7. Each bit in the bit depth is equal to a _____ increase in dynamic range
Analog
Pulse Width Modulation
6 dB
SACD
8. The frequency range that is allowed through a filter
Pass Band
Foldover
Dolby 5.1
Photoreceptor
9. Smallest interval measurable by a scientific instrument; Defined by bit rate (sample rate x bit depth)
Resolution
Lossy
Optical Cable
Requirements for A/D Conversion
10. The number of compressions or rarefactions in one second; The higher the frequency the more compressions & rarefactions per second; Measured in Hertz
Frequency
Pad Head & Tail
Fletcher- Munson Curve
Buffer Size
11. Industry Standards: -6 dB Peak = -20 RMS Meter
Recording Levels
Red Book
Optical Cable
Inter-Channel Redundancy
12. Ratio of magnitude of the analytical signal to the magnitude of the background noise signal
Decoder
Normalizing
AES3
Signal- to- Noise Ratio
13. Same as 'aliasing'
Cutoff Frequency
Foldover
I/O Connection Buffering
Headroom Bits
14. Serial Copy Management System; main difference between AES3 & S/PIDF
Sampling Rule
SCMS
Direct Stream Digital
Edit Decision List
15. Unit of measurement that is equal to one millionth of a meter
D/A Conversion Signal Flow
Sinusoidal
Micron
Equal Loudness Contour
16. 7.95 GB; SS/DL
Adaptive Pulse Code Modulation
Acoustics
Quantizer
DVD-9
17. 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
Delta-Sigma Modulation
EtherSound
Sampling Theorem
Direct Stream Digital
18. 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
Interleaved
Gain Staging
Physical Disc Format
Floating Point
19. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Jitter
Physical Disc Format
Sine Wave
Buffer Size
20. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
RMS Meter
D/A Conversion Signal Flow
Adaptive Pulse Code Modulation
Voltage
21. Allowance of noise floor below that which is required for the final product
Footroom
Bit Depth Effect on Dynamic Range
RMS
Harmonic Content
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
Compression
Tascam Digital Interface Format (TDIF)
Blu-Ray
Coaxial
23. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates
Oscillation
Intensity Stereo
Delta-Sigma Modulation
SACD
24. 12.33 GB; DS/ML
Frames
Sony-Philips Digital Interface Format (S/PDIF)
Intensity Stereo
DVD-14
25. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.
Bit Depth
Harry Nyquist
CPU Buffering
Sawtooth Wave
26. 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
Sample Rate Effect on Anti-Aliasing
Direct Stream Digital
Dolby 7.1
Resolution
27. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Blu-Ray
Algorithm
Subbands
Dolby 7.1
28. 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)
RMS
Overflow
Decimal- to-Binary Conversion
Subbands
29. Method of sampling data at a higher resolution (higher sample rate) as a means of reducing harmonic content during D/A conversion; (x2) oversampling gets rid of all odd harmonic content
Analog
Sawtooth Wave
Lossless
Oversampling
30. 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
Lossless
Transfer Protocol
Glass Master
Perceptual Coding
31. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Inter-Channel Redundancy
Logical Format
EtherSound
RMS Meter
32. Subtract place values from the decimal number and place ones or zeros in the correct places
Fletcher- Munson Curve
Frequency
Zero-Latency Monitoring
Decimal- to-Binary Conversion
33. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Foldover
Blu-Ray
AoE Formats
Significand
34. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Digital Signal Processing
Base 2 System
Pass Band
Peak Level
35. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC
Foldover
Lossless Formats
MONO
Audio over Ethernet (AoE)
36. 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
Algorithm
Anti-Aliasing Filter
Coaxial
2 Dimensions of Sound
37. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
dBFS
Decoder
D/A Conversion Signal Flow
Fourier Series
38. Very selective method of lowering buffer levels by halting different levels of audio processing
Oversampling
Index of Reflectivity
Low-Latency Monitoring
Footroom
39. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Digital
Intensity
Blu-Ray
Stapedes Reflex
40. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Internal Resolution
Index of Reflectivity
Optical Cable
Compression
41. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Lossy Formats
Micron
Glass Master
Logical Format
42. Sony sigma- delta modulation based technology that bypasses the decimation and interpolation steps found in PCM converters
Delta-Sigma Modulation
Playback Buffering
Sonogram
Direct Stream Digital
43. 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
Anti-Aliasing Filter
Jitter
Intensity Stereo
Blu-Ray
44. The loudest point of a Full Scale system
0 dB FS
Sampling Theorem
A/D Conversion
Sawtooth Wave
45. CobraNet; EtherSound; Dante; AVB (currently under development)
Fidelity
Attenuation
Perceptual Coding
AoE Formats
46. Uses entropy coding as the basis; Computer data compression algorithm that packages files such as .ZIP & .RAR
Data Packing
AES3
European Broadcasting Union
Resolution
47. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
Sample Rate
Buffer Size
Requirements for A/D Conversion
Edit Decision List
48. Sample Rate x Bit Depth x # of Channels
Quantizer
Oversampling
Non -Compressed Audio Data Rate Formula
Optical Cable
49. A time regulator that makes all samples and bits to align when working with interconnected digital devices; Basically a signal that all of the digital devices refer to when operating.
European Broadcasting Union
Word Clock
Pulse Density Modulation
Interleaved
50. Waveform of a pure tone showing simple harmonic motion
Sine Wave
Sample- and-Hold
0 dB FS
Exponent