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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. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Joint Stereo
Oscillation
2 Dimensions of Sound
Peak Level
2. Perceptual coding technique that uses louder sounds of a similar frequency to decide what information is to be saved during data reduction
Foldover
Class - D Amplifier
Coaxial
Masking Analysis...
3. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics
RMS
Harmonic Content
Noise Shaping
Blu-Ray
4. 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
SCMS
Red Book
Internal Resolution
Storage Conversion Steps
5. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
AoE Formats
Inter-Channel Redundancy
Buffering
CobraNet
6. 8.75 GB; DS/SL
PCM
Oscillation
DVD-10
Digital
7. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Pass Band
Footroom
Logical Format
Aliasing
8. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)
Y-Axis Terminology
Normalizing
A/D Conversion Signal Flow
Latency
9. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Internal Resolution
Decimal- to-Binary Conversion
Logical Format
Entropy Coding
10. 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
Morse Code
Decimal- to-Binary Conversion
Amplitude Accuracy
Coaxial
11. 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
Nyquist Frequency
Edit Decision List
Audio Engineering Society
Jitter
12. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel
Rarefaction
Joint Stereo
Masking Analysis...
SACD
13. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
Threshold of Pain
Audio over Ethernet (AoE)
Pad Head & Tail
Voltage
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
Lightpipe
Foldover
Average Bit Rate
Oversampling
15. How Loud (Y-Axis) & How Fast (X-Axis)
Analog
AES3
Foldover
2 Dimensions of Sound
16. 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
Morse Code
Foldover
Bit Rate
Successive Approximation
17. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Buffering Locations
Cutoff Frequency
Red Book
dBFS
18. A sample- by- sample operation on two signals
Jitter
Nanometer
Convolution
Ethernet
19. Difference in brightness between land and pit on a CD Physical Format
Index of Reflectivity
Dynamic Range
Frames
Buffering Locations
20. AAC (Advanced Audio Coding); MP3; RA; WMA; OGG Vorbis; Dolby Digital/AC-3; DTS; ADPCM
Quantization
Lossy Formats
EtherSound
Additive Synthesis...
21. 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
Quantization Intervals
dB/SPL
Compression
Glass Master
22. Accuracy with which an electronic system reproduces the sound or image of its input signal
Zero-Latency Monitoring
D/A Conversion Signal Flow
Fidelity
Footroom
23. 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
EtherSound
dB/FS
Dolby 7.1
Optical Cable
24. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Acoustics
Anti-Aliasing Filter
Bit Depth
Direct Monitoring
25. Toshiba developed digital audio interface utilizes fiber optics as a transmission medium.
TOSLINK
Motion Pictures Experts Group
Oversampling
M-S Stereo
26. The frequency range that is allowed through a filter
CPU Buffering
Nanometer
Pass Band
Interpolation Filter
27. 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
M-S Stereo
Lossless
Masking Analysis...
Aliasing
28. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
Multichannel Audio Digital Interface (MADI)
Buffering Locations
Quantization
RMS
29. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
Equal Loudness Contour
Motion Pictures Experts Group
DVD-14
dB/SPL
30. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
I/O Connection Buffering
DVD-14
Zero-Latency Monitoring
Dithering
31. 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
Playback Buffering
2 Dimensions of Sound
Conversion Buffering
Peak Level
32. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
Threshold of Hearing
Headroom Bits
Index of Reflectivity
DVD-Audio
33. Increases or decreases the digital signal so that the loudest sample is brought up to 0dBfs; Uses all bits from dynamic range and makes it even from track to track
Subbands
Normalizing
Recording Levels
Nyquist Frequency
34. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Significand
Direct Stream Digital
Entropy Coding
Optical Cable
35. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Harry Nyquist
Morse Code
Quantization Intervals
X-Axis Terminology
36. Contains all even and odd harmonics associated with a fundamental tone - making it a rich source for modeling other sounds; Amplitude of each overtone decreases exponentially as a ratio of the harmonic's frequency to that of the fundamental
Blu-Ray
Morse Code
Sawtooth Wave
Exponent
37. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Sony-Philips Digital Interface Format (S/PDIF)
Blu-Ray
Frequency
Lightpipe
38. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Oscillation
Sampling Rule
Playback Buffering
Redither
39. Eight channel digital surround sound system by Dolby
Equal Loudness Contour
Dolby 7.1
Sinusoidal
Pad Head & Tail
40. The more bits allocated during quantization - the more accurate the measurement
SCMS
Bit Depth Effect on Dynamic Range
Acoustics
Signal- to- Noise Ratio
41. Electromagnetic receptor that detects the radiation known as visible light
Audio Engineering Society
Psychoacoustics
Photoreceptor
Entropy Coding
42. Eliminates frequencies above the Nyquist limit from becoming samples; Occurs prior to quantization
Anti-Aliasing Filter
Significand
Class - D Amplifier
AoE Formats
43. 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
Analog
Gain Staging
M-S Stereo
Lossy
44. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Physical Disc Format
Algorithm
Joseph Fourier
Codec
45. Mixing data and control characters in a single operation
Interleaved
Photoreceptor
Quantization Error
DVD-18
46. AES
Convolution
Audio Engineering Society
Class - D Amplifier
Attenuation
47. French mathematician that noted that any complex sound can be broken down into a series of component pure tones
RMS Meter
Frames
Amplitude Accuracy
Joseph Fourier
48. MPEG; Standardizing body of audio coding
Index of Reflectivity
Sample- and-Hold
Motion Pictures Experts Group
Pulse Density Modulation
49. Roughly around 1 -130 ft/s
Transfer Protocol
RMS
Speed of Sound
AoE Formats
50. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Buffering Locations
TOSLINK
Oversampling
Storage Conversion Steps