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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
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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
Effective Bit Depth
DVD-10
Micron
Codec
2. Decibels Full Scale
Playback Buffering
dBFS
Quantization
Quantizer
3. 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
Pulse Density Modulation
Audio Engineering Society
Joint Stereo
Optical Cable
4. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Sonogram
Pad Head & Tail
Digital Signal Processing
Normalizing
5. Electromagnetic receptor that detects the radiation known as visible light
Pulse Density Modulation
Photoreceptor
Data Packing
Coaxial
6. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Lossless Formats
Signal- to- Noise Ratio
Pulse Code Modulation
Digital
7. 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
Y-Axis Terminology
Successive Approximation
Compression
SCMS
8. Used when the reference pressure of a sound is 20 microPa (0.00002); Sound Pressure Level; Measure of amplitude
Blu-Ray
dB/SPL
Playback Buffering
Equal Loudness Contour
9. Toshiba developed digital audio interface utilizes fiber optics as a transmission medium.
TOSLINK
Digital
Constant Bit Rate
Lossy
10. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Lossless Formats
Coaxial
CPU Buffering
Buffering Locations
11. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Index of Reflectivity
Quantizer
Rarefaction
Compression
12. Subtract place values from the decimal number and place ones or zeros in the correct places
Foldover
I/O Connection Buffering
Optical Cable
Decimal- to-Binary Conversion
13. Measure of the amplitude of a longitudinal wave
Dithering
Buffering
Intensity
Constant Bit Rate
14. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
Floating Point
Equal Loudness Contour
Square Wave
Direct Stream Digital
15. The continuous loss of signal strengths as a signal travels through a medium
Attenuation
Dithering
Sawtooth Wave
Overflow
16. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics
Constant Bit Rate
Digital
Harmonic Content
I/O Connection Buffering
17. Industry Standards: -6 dB Peak = -20 RMS Meter
Recording Levels
D/A Conversion
Adaptive Pulse Code Modulation
Dynamic Range
18. 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
Lossy
Intensity
Oversampling
Fidelity
19. MPEG; Standardizing body of audio coding
Motion Pictures Experts Group
Low-Latency Monitoring
AoE Formats
Frequency
20. 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
Bit Depth Effect on Dynamic Range
Coaxial
Audio Engineering Society
Pulse Code Modulation
21. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Anti-Aliasing Filter
Significand
Compression
Peak Level
22. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Y-Axis Terminology
Latency
AES3
Direct Stream Digital
23. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Cutoff Frequency
Floating Point
Stapedes Reflex
X-Axis Terminology
24. Sample Rate x Bit Depth x # of Channels
Non -Compressed Audio Data Rate Formula
Conversion Buffering
X-Axis Terminology
Noise Shaping
25. ADPCM; Pulse code modulation that produces a digital signal with a lower bit rate than standard PCM; Records only the difference between samples
Oversampling
Pass Band
Adaptive Pulse Code Modulation
Audio over Ethernet (AoE)
26. The set of rules that computers use to move files from one computer to another on an internet
Transfer Protocol
Pulse Width Modulation
Motion Pictures Experts Group
Non -Compressed Audio Data Rate Formula
27. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Effective Bit Depth
Algorithm
DVD-14
Quantization Error
28. 'Capturing' part of digital audio; Never captures a signal perfectly
Nanometer
Floating Point
A/D Conversion
Oversampling
29. 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
Lightpipe
Lossless Formats
Adaptive Pulse Code Modulation
30. French mathematician that noted that any complex sound can be broken down into a series of component pure tones
D/A Conversion Signal Flow
Entropy Coding
Joseph Fourier
Quantization Intervals
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
Exponent
Decimation Filter
Sample Rate
Sample Rate Effect on Anti-Aliasing
32. Having a repeated succession of waves or curves as in a sound waveform
Footroom
Blu-Ray
MONO
Sinusoidal
33. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Cutoff Frequency
Quantization Error
Dolby 5.1
Tascam Digital Interface Format (TDIF)
34. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Conversion Buffering
Additive Synthesis...
Red Book
Foldover
35. 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
Interleaved
Audio over Ethernet (AoE)
Average Bit Rate
Oversampling
36. The amount of energy at each wavelength
Exponent
Average Bit Rate
Spectra
Lightpipe
37. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
Conversion Buffering
Intensity Stereo
Acoustics
Sampling Rule
38. 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
DVD-9
Interpolation Filter
Sinusoidal
Word Clock
39. 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
Dithering
Internal Resolution
Variable Bit Rate
RMS Meter
40. Serial Copy Management System; main difference between AES3 & S/PIDF
SCMS
Micron
Logical Format
Effective Bit Depth
41. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Quantization Intervals
Masking Analysis...
Decimation Filter
Interpolation Filter
42. Eliminates frequencies above the Nyquist limit from becoming samples; Occurs prior to quantization
Anti-Aliasing Filter
Redither
Bit Depth Effect on Dynamic Range
Multichannel Audio Digital Interface (MADI)
43. 1.) Bit Rate x Sample Rate (you'll get b/sec) 2.) Multiply by 60 if converting seconds to minutes 3.) Divide by 8 to convert bits to Bytes and get B/min 4.) Divide by 1 -024 to get KB/min and keep doing it until you get desired bit rate specification
Audio over Ethernet (AoE)
European Broadcasting Union
Storage Conversion Steps
Dolby 7.1
44. How Loud (Y-Axis) & How Fast (X-Axis)
2 Dimensions of Sound
Glass Master
Storage Conversion Steps
Buffering Locations
45. Visual graph that shows how loud a sound is at different frequencies
Morse Code
Sonogram
Interleaved
Variable Bit Rate
46. Eight channel digital surround sound system by Dolby
Dolby 7.1
Inter-Channel Redundancy
Successive Approximation
Buffer Size
47. Full Scale; Type of metering that measures level in digital recording system; Recording and Mixing levels should NEVER exceed 0dB FS in digital audio or clipping will occur
dB/FS
Aliasing
Footroom
Stapedes Reflex
48. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Bit Depth
Digital Signal Processing
Lossless
Foldover
49. Unit of measurement that is equal to one billionth of a meter
Algorithm
Nanometer
Audio Engineering Society
D/A Conversion Signal Flow
50. A drive that can read and write on optical media that hold up to 50 GB on two layers; 24- bit/96 kHz for 8-Channel; 24- bit/192 kHz for 6-Channel
Blu-Ray
Equal Loudness Contour
Resolution
Fletcher- Munson Curve
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