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Test your basic knowledge |
Digital Audio
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Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. Serial Copy Management System; main difference between AES3 & S/PIDF
SCMS
CobraNet
Lossy
6 dB
2. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Compression
Pulse Density Modulation
Perceptual Coding
Decimation Filter
3. A method of representing real numbers using a mantissa and an exponent
Normalizing
Nyquist Frequency
Floating Point
Subbands
4. Same as 'aliasing'
Edit Decision List
Class - D Amplifier
Physical Disc Format
Foldover
5. 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
Harmonic Content
Oversampling
Glass Master
CPU Buffering
6. 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
Pad Head & Tail
Dolby 7.1
Cutoff Frequency
Lossy
7. Multi-Bit Words; (Pulse Code Modulation)
Latency
Sample Rate
PCM
Photoreceptor
8. 'Capturing' part of digital audio; Never captures a signal perfectly
SCMS
A/D Conversion
Successive Approximation
Algorithm
9. A digital filter's time domain output sequence when the input is a single sample is input
Constant Bit Rate
Intensity Stereo
Impulse Response
M-S Stereo
10. Having a repeated succession of waves or curves as in a sound waveform
Storage Conversion Steps
Sample Rate Effect on Anti-Aliasing
X-Axis Terminology
Sinusoidal
11. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel
DVD-5
Frames
DVD-18
SACD
12. 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
Interpolation Filter
Oversampling
Sine Wave
Oscillation
13. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission
Voltage
Analog
Speed of Sound
Edit Decision List
14. Unit of measurement that is equal to one millionth of a meter
European Broadcasting Union
Micron
dBFS
Footroom
15. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Redither
Lossless Formats
Bit Depth
Codec
16. 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'
Pad Head & Tail
Claude Shannon
Latency
Adaptive Pulse Code Modulation
17. The set of rules that computers use to move files from one computer to another on an internet
Sine Wave
Multichannel Audio Digital Interface (MADI)
Transfer Protocol
Lossy
18. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Sony-Philips Digital Interface Format (S/PDIF)
Buffering Locations
Gain Staging
Direct Stream Digital
19. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Multichannel Audio Digital Interface (MADI)
Analog
Oscillation
Digital Signal Processing
20. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
MONO
Multichannel Audio Digital Interface (MADI)
DVD-10
Nanometer
21. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Word Clock
Edit Decision List
Decoder
Quantization Intervals
22. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size
Psychoacoustics
Codec
Pulse Code Modulation
Impulse Response
23. Softest sound that can be heard by the average human ear (0 dB)
Audio Engineering Society
Threshold of Hearing
AES3
Edit Decision List
24. Electromagnetic receptor that detects the radiation known as visible light
DVD-10
Rarefaction
Photoreceptor
X-Axis Terminology
25. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Adaptive Pulse Code Modulation
A/D Conversion
Acoustics
D/A Conversion Signal Flow
26. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Sampling Rule
RMS Meter
Decimation Filter
Digital
27. Also known as equal loudness curves; Graph that indicates the average ear sensitivity to different frequencies at different SPL levels (as volume increases - these curves flatten out)
Headroom Bits
Decimation Filter
Fletcher- Munson Curve
Fourier Series
28. Data transmission protocol over which computer network traffic travels; Poorly suited to real- time transmission but numerous attempts have been made to harness the technology because of its flexible routing; Uses simple Cat5 cabling; Resists interfe
Audio over Ethernet (AoE)
Inter-Channel Redundancy
Bit Depth Effect on Dynamic Range
Playback Buffering
29. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector
Significand
A/D Conversion
Lightpipe
Recording Levels
30. 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
Threshold of Pain
Entropy Coding
31. 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
Frames
Anti-Imaging Filter
Successive Approximation
Attenuation
32. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
Lossy Formats
Subbands
Quantization Intervals
CobraNet
33. 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
Playback Buffering
Lossy
Glass Master
Spectrum Multiplication
34. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Direct Stream Digital
Digital
Buffering
D/A Conversion
35. The difference in volume between the loudest and quietest sounds of a source
Dolby 5.1
Dynamic Range
Optical Cable
Motion Pictures Experts Group
36. 8- in/8- out on one cable; 25- pin D- sub connector
Tascam Digital Interface Format (TDIF)
Spectrum Multiplication
Pad Head & Tail
I/O Connection Buffering
37. Subtract place values from the decimal number and place ones or zeros in the correct places
Tascam Digital Interface Format (TDIF)
DVD-18
Decimal- to-Binary Conversion
Interpolation Filter
38. 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
CobraNet
Storage Conversion Steps
CPU Buffering
Noise Shaping
39. 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
Blu-Ray
Pulse Code Modulation
Footroom
Jitter
40. In order to play multiple channels at one time data is buffered as read to disk; Latency happens between play command & beginning of playback
Playback Buffering
Normalizing
Psychoacoustics
Logical Format
41. Each bit in the bit depth is equal to a _____ increase in dynamic range
AoE Formats
Convolution
6 dB
CobraNet
42. A situation where a calculated value cannot fit into the number of digits reserved for it
Overflow
Exponent
Direct Stream Digital
Data Packing
43. 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.
Optical Cable
Conversion Buffering
Entropy Coding
Word Clock
44. 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
Lossless
Base 2 System
Lossless Formats
Tascam Digital Interface Format (TDIF)
45. Branch of psychology concerned with the subjective perception of sound
Psychoacoustics
D/A Conversion Signal Flow
SACD
Fletcher- Munson Curve
46. Visual graph that shows how loud a sound is at different frequencies
Sample Rate
Data Packing
Anti-Aliasing Filter
Sonogram
47. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Amplitude Accuracy
Stapedes Reflex
Threshold of Hearing
Nyquist Frequency
48. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Bit Rate
Joint Stereo
dB/FS
DVD-Audio
49. EDL; Final list of samples used in the audio editing process; Identified by time code
SACD
Edit Decision List
DVD-10
Frames
50. 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
D/A Conversion
Data Packing
Variable Bit Rate
Spectra
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