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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. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Lossless
Low-Latency Monitoring
Digital Signal Processing
Pulse Width Modulation
2. Unit of measurement that is equal to one millionth of a meter
Exponent
Non -Compressed Audio Data Rate Formula
Sinusoidal
Micron
3. Accuracy with which an electronic system reproduces the sound or image of its input signal
Pulse Density Modulation
Fidelity
SACD
Fourier Series
4. The frequency range that is allowed through a filter
Pass Band
Algorithm
SACD
D/A Conversion Signal Flow
5. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating
Physical Disc Format
Effective Bit Depth
Square Wave
Harry Nyquist
6. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Digital Signal Processing
Cutoff Frequency
Y-Axis Terminology
Red Book
7. 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
Intensity Stereo
Conversion Buffering
Motion Pictures Experts Group
Quantization Intervals
8. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
TOSLINK
AoE Formats
CobraNet
Aliasing
9. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage
Quantizer
Dolby 5.1
Lossy Formats
Low-Latency Monitoring
10. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector
Class - D Amplifier
Codec
Conversion Buffering
Lightpipe
11. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Word Clock
Stapedes Reflex
SCMS
Interleaved
12. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Quantization Intervals
Edit Decision List
Storage Conversion Steps
Headroom Bits
13. Electromagnetic receptor that detects the radiation known as visible light
Photoreceptor
CPU Buffering
Adaptive Pulse Code Modulation
Bit Depth Effect on Dynamic Range
14. AAC (Advanced Audio Coding); MP3; RA; WMA; OGG Vorbis; Dolby Digital/AC-3; DTS; ADPCM
Frequency
Delta-Sigma Modulation
Lossy Formats
Lightpipe
15. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Logical Format
Morse Code
Sampling (Samples)
dBFS
16. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Rarefaction
Adaptive Pulse Code Modulation
Bit Rate
Sample- and-Hold
17. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size
Convolution
Codec
Edit Decision List
Blu-Ray
18. Allowance of noise floor below that which is required for the final product
Glass Master
Footroom
Requirements for A/D Conversion
Morse Code
19. Contains all even and odd harmonics associated with a fundamental tone - making it a rich source for modeling other sounds; Amplitude of each overtone decreases exponentially as a ratio of the harmonic's frequency to that of the fundamental
Fletcher- Munson Curve
Pass Band
Intensity
Sawtooth Wave
20. 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
Oversampling
Intensity Stereo
Decoder
DVD-5
21. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Cutoff Frequency
Multichannel Audio Digital Interface (MADI)
Red Book
Quantizer
22. Industry Standards: -6 dB Peak = -20 RMS Meter
Oscillation
Sample Rate Effect on Anti-Aliasing
Recording Levels
Peak Level
23. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
Audio Engineering Society
D/A Conversion Signal Flow
Square Wave
Sony-Philips Digital Interface Format (S/PDIF)
24. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
Pulse Width Modulation
Decimal- to-Binary Conversion
Conversion Buffering
dB/SPL
25. Series of dots and dashes representing the letters of the alphabet; Most common letters are represented by the shortest dots and dashes; Example of entropy coding
Quantization Error
Threshold of Hearing
Redither
Morse Code
26. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Bit Rate
Sine Wave
Y-Axis Terminology
Interleaved
27. Very quiet digital amplifier that produces a series of output pulses with the audio signal coded the same as the width of the output pulses; Pulses are used to represent wave forms and are either on or off; Intense signals have long pulses with short
RMS
Requirements for CD Audio
Class - D Amplifier
Spectrum Multiplication
28. The process of reducing the space required to store data by efficiently encoding the content.
Index of Reflectivity
Conversion Buffering
RMS Meter
Compression
29. Reference voltage determined by summing the voltage values of a predetermined number of previous samples; Numbers of 1 in row = waveform peak; Numbers of 0 in row = waveform trough; Basis of Sony's Direct Stream Digital (DSD)
Aliasing
Anti-Imaging Filter
Pad Head & Tail
Pulse Density Modulation
30. 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
TOSLINK
Optical Cable
Pulse Code Modulation
Latency
31. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Joseph Fourier
Requirements for CD Audio
Decoder
Constant Bit Rate
32. Serial Copy Management System; main difference between AES3 & S/PIDF
Redither
Oscillation
SCMS
Fidelity
33. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Buffering Locations
Sony-Philips Digital Interface Format (S/PDIF)
Sinusoidal
Intensity
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
A/D Conversion Signal Flow
Fourier Series
Claude Shannon
Successive Approximation
35. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates
Delta-Sigma Modulation
SCMS
Direct Stream Digital
Additive Synthesis...
36. Branch of psychology concerned with the subjective perception of sound
Psychoacoustics
SACD
EtherSound
Additive Synthesis...
37. 'Capturing' part of digital audio; Never captures a signal perfectly
Requirements for A/D Conversion
Entropy Coding
Sonogram
A/D Conversion
38. 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.
Gain Staging
Morse Code
Word Clock
Dolby 7.1
39. Signal conversions are mixed with playback tracks resulting in near-zero latency
Rarefaction
Aliasing
Direct Monitoring
RMS Meter
40. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics
Sampling Rule
Perceptual Coding
Harmonic Content
Sample- and-Hold
41. Each bit in the bit depth is equal to a _____ increase in dynamic range
Anti-Imaging Filter
6 dB
Fourier Series
Sampling Theorem
42. The set of rules that computers use to move files from one computer to another on an internet
Sampling Rule
Threshold of Pain
Transfer Protocol
Codec
43. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Cutoff Frequency
Interpolation Filter
Significand
dBFS
44. Sample Rate x Bit Depth x # of Channels
Non -Compressed Audio Data Rate Formula
DVD-14
Compression
SCMS
45. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
M-S Stereo
Blu-Ray
Threshold of Hearing
Interleaved
46. Splits the input signal and mixes it with an analog copy so that no latency is present
Oversampling
Oversampling
Zero-Latency Monitoring
Photoreceptor
47. 8- in/8- out on one cable; 25- pin D- sub connector
Tascam Digital Interface Format (TDIF)
X-Axis Terminology
Base 2 System
Fourier Series
48. The more bits allocated during quantization - the more accurate the measurement
Amplitude Accuracy
Low-Latency Monitoring
Bit Depth Effect on Dynamic Range
Lossy Formats
49. 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
Aliasing
Cutoff Frequency
Jitter
PCM
50. The continuous loss of signal strengths as a signal travels through a medium
Bit Depth
Attenuation
Digital Signal Processing
Digital