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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. 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
DVD-Audio
Sawtooth Wave
Quantization Error
DVD-5
2. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Ethernet
AoE Formats
Lossless Formats
Bit Rate
3. Have odd numbered harmonics
Gain Staging
Square Wave
Foldover
DVD-5
4. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
Data Packing
Oscillation
Lossy
Edit Decision List
5. Same as 'aliasing'
Physical Disc Format
Foldover
Noise Shaping
Internal Resolution
6. Difference in brightness between land and pit on a CD Physical Format
Base 2 System
Quantizer
Lossless
Index of Reflectivity
7. A sample- by- sample operation on two signals
Requirements for CD Audio
Intensity Stereo
Convolution
Dynamic Range
8. Multi-Bit Words; (Pulse Code Modulation)
Cutoff Frequency
PCM
Equal Loudness Contour
Sinusoidal
9. 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
Pulse Code Modulation
Gain Staging
Compression
6 dB
10. A digital filter's time domain output sequence when the input is a single sample is input
Optical Cable
Foldover
Impulse Response
Fletcher- Munson Curve
11. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Harry Nyquist
Lossy
Perceptual Coding
Digital Signal Processing
12. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Fletcher- Munson Curve
Quantization
Zero-Latency Monitoring
Redither
13. 12.33 GB; DS/ML
Photoreceptor
DVD-14
Fidelity
Base 2 System
14. Softest sound that can be heard by the average human ear (0 dB)
Anti-Imaging Filter
Fidelity
Sony-Philips Digital Interface Format (S/PDIF)
Threshold of Hearing
15. 'Reconstructing' part of digital audio
Decimal- to-Binary Conversion
Amplitude Accuracy
Additive Synthesis...
D/A Conversion
16. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC
Lightpipe
Nanometer
Average Bit Rate
Lossless Formats
17. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Internal Resolution
Quantizer
Buffering Locations
Fletcher- Munson Curve
18. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics
Digital
Harmonic Content
Cutoff Frequency
Sample- and-Hold
19. Splits the input signal and mixes it with an analog copy so that no latency is present
Zero-Latency Monitoring
Motion Pictures Experts Group
Y-Axis Terminology
Gain Staging
20. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
DVD-Audio
Transfer Protocol
Red Book
Sampling Theorem
21. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics
Footroom
Logical Format
Additive Synthesis...
Algorithm
22. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Sample Rate
Pulse Width Modulation
Decimal- to-Binary Conversion
Dolby 5.1
23. 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
Ethernet
Noise Shaping
Digital
Lossy Formats
24. 7.95 GB; SS/DL
RMS
DVD-18
DVD-9
Sampling Theorem
25. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Logical Format
Decimation Filter
Sample Rate Effect on Anti-Aliasing
Speed of Sound
26. A method of representing real numbers using a mantissa and an exponent
Buffering Locations
Psychoacoustics
Floating Point
Convolution
27. 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
Fidelity
Glass Master
Physical Disc Format
28. Sample Rate x Bit Depth x # of Channels
Sampling Theorem
Effective Bit Depth
Coaxial
Non -Compressed Audio Data Rate Formula
29. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Oversampling
Significand
Buffering
Equal Loudness Contour
30. 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
Decimation Filter
Successive Approximation
Quantization
Sample Rate Effect on Anti-Aliasing
31. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude
Sinusoidal
Blu-Ray
dB/SPL
Exponent
32. Level above which audible sounds are painful (125 - 130 db)
Threshold of Pain
Intensity Stereo
Non -Compressed Audio Data Rate Formula
Pad Head & Tail
33. EBU
CPU Buffering
Oversampling
Impulse Response
European Broadcasting Union
34. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
I/O Connection Buffering
Motion Pictures Experts Group
Codec
Jitter
35. The continuous loss of signal strengths as a signal travels through a medium
Lossy
Interpolation Filter
Audio over Ethernet (AoE)
Attenuation
36. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size
Dolby 5.1
Codec
Audio over Ethernet (AoE)
Square Wave
37. Subtract place values from the decimal number and place ones or zeros in the correct places
AES3
Sine Wave
0 dB FS
Decimal- to-Binary Conversion
38. Branch of psychology concerned with the subjective perception of sound
Oscillation
Psychoacoustics
Exponent
Headroom Bits
39. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
Sony-Philips Digital Interface Format (S/PDIF)
Resolution
Nanometer
Pulse Density Modulation
40. 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.
Aliasing
DVD-9
Dolby 5.1
Buffering
41. Algorithm uses matrix of a mid/side microphone pair to determine a side signal & that signal is reduced then distributed as code in stereo
Decimation Filter
DVD-14
RMS
M-S Stereo
42. 4.38 GB; SS/SL
Morse Code
DVD-5
Successive Approximation
Recording Levels
43. The difference in volume between the loudest and quietest sounds of a source
Dynamic Range
Blu-Ray
Nanometer
RMS Meter
44. 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
Class - D Amplifier
Significand
Dolby 7.1
Frequency
45. Removes high frequency images and noise and smoothes the stair case output coming from of the sample and hold circuit; Also called a SMOOTHING FILTER
Quantization Intervals
Threshold of Pain
Anti-Imaging Filter
Decimation Filter
46. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
6 dB
Tascam Digital Interface Format (TDIF)
Decoder
Transfer Protocol
47. Eight channel digital surround sound system by Dolby
Additive Synthesis...
Coaxial
Buffering
Dolby 7.1
48. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission
Dithering
Analog
Base 2 System
Lightpipe
49. 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
Coaxial
Data Packing
X-Axis Terminology
Zero-Latency Monitoring
50. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Nanometer
Digital
Edit Decision List
Exponent