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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. Circuit that seizes voltage values with each tick of an A/D device's internal clock
I/O Connection Buffering
Sample- and-Hold
Analog
Peak Level
2. CBR; Codecs encodes data at a constant rate regardless of density of the audio file
Zero-Latency Monitoring
Constant Bit Rate
Bit Rate
Attenuation
3. A method of representing real numbers using a mantissa and an exponent
Floating Point
Red Book
Multichannel Audio Digital Interface (MADI)
Blu-Ray
4. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)
Latency
Fourier Series
A/D Conversion Signal Flow
Physical Disc Format
5. Take up half as many bits (50%); Algorithm can keep same quality by lossing the stereo track
Anti-Imaging Filter
Voltage
M-S Stereo
MONO
6. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission
Decimal- to-Binary Conversion
Analog
Blu-Ray
Oversampling
7. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Blu-Ray
Transfer Protocol
Buffer Size
Algorithm
8. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Dolby 5.1
Fourier Series
Acoustics
Dithering
9. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Buffer Size
Frames
Algorithm
Dithering
10. Each bit in the bit depth is equal to a _____ increase in dynamic range
6 dB
Harmonic Content
Photoreceptor
Coaxial
11. Stores only one copy of a stereo signal and assigns it to both channels in order to save 50% of original bandwidth
Morse Code
Spectrum Multiplication
Dolby 5.1
Inter-Channel Redundancy
12. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
Signal- to- Noise Ratio
Physical Disc Format
Inter-Channel Redundancy
CobraNet
13. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
Conversion Buffering
Joint Stereo
Latency
Compression
14. ABR; Codecs that encode data by determining how dense or sparse areas of the audio are while also keeping bit rate within specified limits to avoid rebuffering
Average Bit Rate
Word Clock
RMS Meter
Impulse Response
15. RAM holds in memory audio data before it is transferred to the memory controller; Certain amount of data is processed before large amounts of data are streamed to prevent latency
Frames
Equal Loudness Contour
Micron
Buffering
16. Very selective method of lowering buffer levels by halting different levels of audio processing
Low-Latency Monitoring
Pass Band
Spectra
European Broadcasting Union
17. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Interpolation Filter
Coaxial
Adaptive Pulse Code Modulation
Digital
18. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Amplitude Accuracy
Speed of Sound
dB/SPL
Logical Format
19. 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
Significand
Nyquist Frequency
Masking Analysis...
20. 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
PCM
DVD-10
Headroom Bits
Class - D Amplifier
21. Roughly around 1 -130 ft/s
Recording Levels
Oversampling
Speed of Sound
X-Axis Terminology
22. Serial Copy Management System; main difference between AES3 & S/PIDF
Speed of Sound
SCMS
Claude Shannon
Delta-Sigma Modulation
23. 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
Morse Code
Logical Format
Variable Bit Rate
Glass Master
24. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
Voltage
Amplitude Accuracy
Y-Axis Terminology
A/D Conversion
25. Data reduction technique that does not effect quality of original audio; No effect on original quality; Typically around 50% reduction; Exact reconstruction of digital code for the audio signal
Lossless
Photoreceptor
Fourier Series
TOSLINK
26. Process that begins with a fast FFT analysis of the spectra of two input signals - then the multiplication of like frequencies - and IFFT to finalize the process
Footroom
Conversion Buffering
Joseph Fourier
Spectrum Multiplication
27. 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
Nyquist Frequency
D/A Conversion Signal Flow
Variable Bit Rate
Sine Wave
28. Accuracy with which an electronic system reproduces the sound or image of its input signal
DVD-9
Normalizing
Lightpipe
Fidelity
29. Have odd numbered harmonics
Codec
DVD-14
Nyquist Frequency
Square Wave
30. 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
CobraNet
Psychoacoustics
Transfer Protocol
Base 2 System
31. 15.9 GB; DS/DL
Buffer Size
Quantization Error
DVD-18
Attenuation
32. A sample- by- sample operation on two signals
Oversampling
Convolution
Jitter
Algorithm
33. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Physical Disc Format
Red Book
Significand
Requirements for A/D Conversion
34. 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
Stapedes Reflex
Peak Level
Cutoff Frequency
Variable Bit Rate
35. The continuous loss of signal strengths as a signal travels through a medium
Pad Head & Tail
Quantization Error
RMS Meter
Attenuation
36. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Internal Resolution
Joint Stereo
Aliasing
Lossy Formats
37. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
Red Book
Inter-Channel Redundancy
Equal Loudness Contour
Threshold of Pain
38. 8- in/8- out on one cable; 25- pin D- sub connector
Tascam Digital Interface Format (TDIF)
Interpolation Filter
RMS
6 dB
39. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector
Headroom Bits
Lightpipe
Sampling Theorem
Resolution
40. How Loud (Y-Axis) & How Fast (X-Axis)
2 Dimensions of Sound
Sample- and-Hold
Sony-Philips Digital Interface Format (S/PDIF)
Square Wave
41. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Rarefaction
Inter-Channel Redundancy
Normalizing
Peak Level
42. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Micron
Digital Signal Processing
Storage Conversion Steps
Frames
43. Algorithm uses matrix of a mid/side microphone pair to determine a side signal & that signal is reduced then distributed as code in stereo
Sampling Rule
Fidelity
Oversampling
M-S Stereo
44. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
Impulse Response
Sony-Philips Digital Interface Format (S/PDIF)
Noise Shaping
DVD-5
45. The amount of energy at each wavelength
Effective Bit Depth
Spectra
Significand
Cutoff Frequency
46. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Ethernet
Internal Resolution
Sampling Theorem
Adaptive Pulse Code Modulation
47. Samples are duplicated and the playback sampling rate correspondingly increased; Significantly raises the Nyquist limit to a range well beyond human hearing; Processing 'pushes' the distortion resulting from quantization error into these higher frequ
Dynamic Range
Sample Rate
Noise Shaping
Interpolation Filter
48. 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
Blu-Ray
Ethernet
Compression
Resolution
49. 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
Resolution
Lossless Formats
Gain Staging
Sampling Rule
50. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Stapedes Reflex
Fidelity
DVD-Audio
Joint Stereo