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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. 8.75 GB; DS/SL
Dolby 7.1
Interpolation Filter
DVD-10
Direct Monitoring
2. A digital filter's time domain output sequence when the input is a single sample is input
Interpolation Filter
Storage Conversion Steps
Impulse Response
Algorithm
3. Leaving space at beginning and ending of song for data crunching during mastering; Last step in mastering process
Speed of Sound
Tascam Digital Interface Format (TDIF)
Conversion Buffering
Pad Head & Tail
4. Digital Word -> Series of Resistors (each with assigned charges) -> Sample- and-Hold Circuit -> Anti-Imaging Filter (Smoothing Filter) -> Reconstructed Sample
Logical Format
D/A Conversion Signal Flow
Sine Wave
Edit Decision List
5. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Joint Stereo
Buffering
Multichannel Audio Digital Interface (MADI)
Decimation Filter
6. Difference in brightness between land and pit on a CD Physical Format
Index of Reflectivity
Joint Stereo
Storage Conversion Steps
Bit Rate
7. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
Latency
RMS
DVD-Audio
Buffer Size
8. 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
Overflow
Sampling Theorem
Class - D Amplifier
Oversampling
9. Most significant lossless coding technique in current use; Measure of disorder in which long strings of data are represented by short symbols and uses the shortest symbols to represent the most common repetitive audio data maximizing data reduction
Non -Compressed Audio Data Rate Formula
Entropy Coding
Dithering
Analog
10. More accuracy in low amplitudes and less in higher amplitudes
Interpolation Filter
2 Dimensions of Sound
Morse Code
Amplitude Accuracy
11. Stores only one copy of a stereo signal and assigns it to both channels in order to save 50% of original bandwidth
Nanometer
Inter-Channel Redundancy
Anti-Imaging Filter
Masking Analysis...
12. Reduces the percieved distortion due to quantization error; Low level white noise source is introduced to make the profile of the quantization 'noise' more irregular; Useful when reducing the number of bits per word in a signal (i.e. when converting
Average Bit Rate
Dithering
Oscillation
DVD-5
13. MPEG; Standardizing body of audio coding
Motion Pictures Experts Group
Joseph Fourier
X-Axis Terminology
Data Packing
14. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Y-Axis Terminology
Interpolation Filter
dBFS
Convolution
15. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Logical Format
DVD-10
X-Axis Terminology
Resolution
16. Sum of all harmonics; Sum of sine and cosine waves which have frequencies f - 2f - 3f - 4f...
Dolby 7.1
Anti-Aliasing Filter
Fourier Series
Convolution
17. Snippets of time in which frequency analysis takes place in a perceptual codec
Frames
Digital Signal Processing
Buffering
Interleaved
18. Algorithm uses matrix of a mid/side microphone pair to determine a side signal & that signal is reduced then distributed as code in stereo
Gain Staging
Quantization Error
M-S Stereo
Latency
19. Softest sound that can be heard by the average human ear (0 dB)
Threshold of Pain
Zero-Latency Monitoring
DVD-18
Threshold of Hearing
20. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Bit Depth
Pulse Code Modulation
Acoustics
EtherSound
21. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Joseph Fourier
Sine Wave
Algorithm
Voltage
22. 4.38 GB; SS/SL
Oversampling
Physical Disc Format
DVD-5
Fidelity
23. 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
Sample Rate Effect on Anti-Aliasing
dB/FS
Sample Rate
Buffering
24. Multi-Bit Words; (Pulse Code Modulation)
Resolution
Lightpipe
PCM
Logical Format
25. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)
Digital Signal Processing
Internal Resolution
RMS
A/D Conversion Signal Flow
26. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Harmonic Content
Bit Rate
Noise Shaping
Subbands
27. 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
Sinusoidal
Pulse Density Modulation
Physical Disc Format
Interpolation Filter
28. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
Footroom
Lossless Formats
Oscillation
Multichannel Audio Digital Interface (MADI)
29. Accuracy with which an electronic system reproduces the sound or image of its input signal
Attenuation
Fidelity
Delta-Sigma Modulation
Average Bit Rate
30. Level above which audible sounds are painful (125 - 130 db)
Compression
Threshold of Pain
Impulse Response
Motion Pictures Experts Group
31. 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
Significand
Interpolation Filter
Tascam Digital Interface Format (TDIF)
Sample Rate Effect on Anti-Aliasing
32. 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
Frames
Overflow
Blu-Ray
Lossless
33. Based on psychoacoustics - these are the basis of frequency analysis for a perceptual codec;
Subbands
Quantizer
Quantization
Motion Pictures Experts Group
34. Data reduction technique that selectively removes original information in order to significantly reduce the file size; Some data is lost; Files can be reduced up to 99% in size (90% with no perceived sound quality loss); Bit rate effects the perceive
Fourier Series
Requirements for CD Audio
Lossy
Requirements for A/D Conversion
35. The set of rules that computers use to move files from one computer to another on an internet
Interleaved
Transfer Protocol
Playback Buffering
Cutoff Frequency
36. EDL; Final list of samples used in the audio editing process; Identified by time code
Edit Decision List
I/O Connection Buffering
Bit Rate
Zero-Latency Monitoring
37. 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
Recording Levels
Average Bit Rate
Joint Stereo
Sampling Theorem
38. 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
Sampling (Samples)
Intensity Stereo
Footroom
Optical Cable
39. Measure of the amplitude of a longitudinal wave
Intensity
PCM
Exponent
Intensity Stereo
40. Roughly around 1 -130 ft/s
Blu-Ray
Cutoff Frequency
Speed of Sound
Pulse Width Modulation
41. Mixing data and control characters in a single operation
Decoder
Nyquist Frequency
Rarefaction
Interleaved
42. Channels are processed one at a time and the results are stored on multiple CPU buffers that alternately send data as DAW requests the data for playback; First few seconds are relayed to the buffer prior to processing and playback and it continuously
Sampling Rule
CPU Buffering
Significand
Coaxial
43. 'Reconstructing' part of digital audio
Noise Shaping
Floating Point
Intensity
D/A Conversion
44. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
Spectrum Multiplication
Sony-Philips Digital Interface Format (S/PDIF)
Red Book
TOSLINK
45. Sony sigma- delta modulation based technology that bypasses the decimation and interpolation steps found in PCM converters
Direct Stream Digital
Rarefaction
Intensity
Tascam Digital Interface Format (TDIF)
46. Measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form); There must be a minimum of 2 samples for each cycle in a waveform
Spectra
D/A Conversion
Sampling (Samples)
Foldover
47. Decibels Full Scale
Dithering
DVD-10
dBFS
Micron
48. 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
Headroom Bits
Equal Loudness Contour
Pulse Code Modulation
49. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Cutoff Frequency
Compression
Multichannel Audio Digital Interface (MADI)
Lossless
50. A method of representing real numbers using a mantissa and an exponent
Frequency
Joseph Fourier
Transfer Protocol
Floating Point