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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. Allows for an internal sample rate at multiples of the input and output rates; Alleviates the need for steep 'brickwall' filters; Often combined with internal '1- bit' processing; Increases smoothing effect
Dynamic Range
Oversampling
Inter-Channel Redundancy
CPU Buffering
2. 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
Jitter
Photoreceptor
Sampling Theorem
Coaxial
3. Waveform of a pure tone showing simple harmonic motion
Pulse Density Modulation
Pulse Code Modulation
Sine Wave
Buffering Locations
4. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Buffer Size
Delta-Sigma Modulation
Normalizing
Pass Band
5. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Data Packing
Internal Resolution
Delta-Sigma Modulation
Blu-Ray
6. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit
Buffering
X-Axis Terminology
Sonogram
Sample Rate
7. 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
Non -Compressed Audio Data Rate Formula
Zero-Latency Monitoring
CPU Buffering
Footroom
8. A digital filter's time domain output sequence when the input is a single sample is input
Impulse Response
Fletcher- Munson Curve
Normalizing
Sampling (Samples)
9. 8.75 GB; DS/SL
DVD-10
Audio over Ethernet (AoE)
Red Book
Variable Bit Rate
10. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
AES3
DVD-9
Logical Format
Word Clock
11. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Digital
DVD-Audio
Sonogram
Jitter
12. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Joint Stereo
Inter-Channel Redundancy
Lightpipe
Logical Format
13. The loudest point of a Full Scale system
Nyquist Frequency
Dithering
0 dB FS
AES3
14. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Low-Latency Monitoring
Tascam Digital Interface Format (TDIF)
Dolby 7.1
Compression
15. 7.95 GB; SS/DL
DVD-9
Attenuation
Anti-Imaging Filter
TOSLINK
16. Decibels Full Scale
Quantizer
Dynamic Range
Compression
dBFS
17. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Adaptive Pulse Code Modulation
Cutoff Frequency
Significand
Spectra
18. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
Compression
Subbands
Oscillation
Aliasing
19. AAC (Advanced Audio Coding); MP3; RA; WMA; OGG Vorbis; Dolby Digital/AC-3; DTS; ADPCM
Lossy Formats
Effective Bit Depth
CobraNet
Sampling Rule
20. 4.38 GB; SS/SL
Threshold of Pain
Signal- to- Noise Ratio
DVD-5
Average Bit Rate
21. Digital Word -> Series of Resistors (each with assigned charges) -> Sample- and-Hold Circuit -> Anti-Imaging Filter (Smoothing Filter) -> Reconstructed Sample
Sonogram
Gain Staging
D/A Conversion Signal Flow
Nanometer
22. Governs the frequency response of a digital system; The highest- frequency component that can be captured with a sampling rate; always 1/2 of sampling rate; Also called the limiting frequency
Sine Wave
DVD-Audio
SCMS
Nyquist Frequency
23. Visual graph that shows how loud a sound is at different frequencies
Pad Head & Tail
Sonogram
Joint Stereo
Amplitude Accuracy
24. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Pass Band
Decimation Filter
A/D Conversion Signal Flow
Bit Depth
25. 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
Non -Compressed Audio Data Rate Formula
Decimation Filter
Sampling (Samples)
DVD-14
26. 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
Buffer Size
Inter-Channel Redundancy
Perceptual Coding
Physical Disc Format
27. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Redither
Frames
European Broadcasting Union
Quantization
28. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Amplitude Accuracy
Stapedes Reflex
Lossless Formats
Sony-Philips Digital Interface Format (S/PDIF)
29. Unit of measurement that is equal to one billionth of a meter
Direct Stream Digital
Buffering Locations
Nanometer
Adaptive Pulse Code Modulation
30. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
EtherSound
European Broadcasting Union
Conversion Buffering
Adaptive Pulse Code Modulation
31. 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
Sampling Theorem
Lossy
Logical Format
Psychoacoustics
32. Amplitude meter that takes the square root of all instantaneous amplitudes and averages them to find a mean and squares that value; Useful with particularly complex waveforms
Variable Bit Rate
Digital Signal Processing
RMS Meter
D/A Conversion
33. The amount of energy at each wavelength
Compression
0 dB FS
Spectra
Effective Bit Depth
34. Having a repeated succession of waves or curves as in a sound waveform
Micron
Sampling (Samples)
Sinusoidal
Quantization
35. The elapsed time it takes for a packet of data to arrive at its destination; Lagging or pause of an audio signal as digital processing occurs; Can be managed utilizing several forms of 'audio monitoring'
Sine Wave
Latency
DVD-Audio
Direct Stream Digital
36. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates
Dithering
DVD-14
Delta-Sigma Modulation
Algorithm
37. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
Multichannel Audio Digital Interface (MADI)
Bit Rate
Base 2 System
Fletcher- Munson Curve
38. Same as 'aliasing'
Low-Latency Monitoring
Compression
Edit Decision List
Foldover
39. 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
SCMS
Cutoff Frequency
Morse Code
Frames
40. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Acoustics
Direct Stream Digital
Logical Format
Rarefaction
41. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.
Jitter
Lossy
dB/FS
Harry Nyquist
42. Digital (binary) measurements of how long each pulse is either on or off; Width of increasing voltage or decreasing voltage is assigned a 1 or 0 respectively
Pulse Width Modulation
Audio Engineering Society
Lossy
Base 2 System
43. Sony sigma- delta modulation based technology that bypasses the decimation and interpolation steps found in PCM converters
Glass Master
Ethernet
Direct Stream Digital
D/A Conversion
44. A method of representing real numbers using a mantissa and an exponent
Quantization Intervals
Dynamic Range
Floating Point
Intensity Stereo
45. EBU
European Broadcasting Union
Intensity Stereo
Redither
Oversampling
46. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Blu-Ray
Normalizing
Variable Bit Rate
Requirements for A/D Conversion
47. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
dB/SPL
Threshold of Pain
EtherSound
Pulse Density Modulation
48. 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
Storage Conversion Steps
Nanometer
Optical Cable
Decimal- to-Binary Conversion
49. The more bits allocated during quantization - the more accurate the measurement
Sample Rate
Optical Cable
Recording Levels
Bit Depth Effect on Dynamic Range
50. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Bit Rate
Foldover
Aliasing
2 Dimensions of Sound