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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. 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'
Latency
Overflow
Acoustics
Conversion Buffering
2. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
Dolby 5.1
Sampling (Samples)
Sample Rate
Latency
3. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Speed of Sound
Resolution
Optical Cable
Sample- and-Hold
4. Smallest interval measurable by a scientific instrument; Defined by bit rate (sample rate x bit depth)
Additive Synthesis...
Resolution
D/A Conversion Signal Flow
Subbands
5. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Spectrum Multiplication
DVD-Audio
Overflow
Quantization Intervals
6. 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
Sinusoidal
Algorithm
Anti-Imaging Filter
Spectrum Multiplication
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
Speed of Sound
CPU Buffering
Intensity Stereo
Lossy Formats
8. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Oversampling
Inter-Channel Redundancy
Algorithm
Spectra
9. Ratio of magnitude of the analytical signal to the magnitude of the background noise signal
Signal- to- Noise Ratio
Glass Master
Physical Disc Format
Psychoacoustics
10. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Decoder
Audio Engineering Society
DVD-9
Latency
11. AES
Fletcher- Munson Curve
Audio Engineering Society
SACD
Compression
12. Eight channel digital surround sound system by Dolby
Oscillation
Dolby 7.1
Conversion Buffering
Tascam Digital Interface Format (TDIF)
13. 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
CobraNet
Nyquist Frequency
Audio Engineering Society
Sample Rate
14. Softest sound that can be heard by the average human ear (0 dB)
Decimal- to-Binary Conversion
Threshold of Hearing
Delta-Sigma Modulation
Inter-Channel Redundancy
15. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude
SACD
Joint Stereo
Y-Axis Terminology
Exponent
16. Used when the reference pressure of a sound is 20 microPa (0.00002); Sound Pressure Level; Measure of amplitude
Spectra
dB/SPL
Speed of Sound
Index of Reflectivity
17. Joint-Stereo Technique; Since the human brain is unable to localize sounds at high frequencies well sounds above 9 kHz threshold are encoded in mono
Algorithm
Intensity Stereo
Threshold of Pain
Digital Signal Processing
18. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
Sampling Theorem
Equal Loudness Contour
Y-Axis Terminology
Threshold of Hearing
19. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC
Intensity Stereo
Joint Stereo
D/A Conversion Signal Flow
Lossless Formats
20. More accuracy in low amplitudes and less in higher amplitudes
Buffering
Amplitude Accuracy
Threshold of Pain
Peak Level
21. Branch of psychology concerned with the subjective perception of sound
Psychoacoustics
Pulse Width Modulation
Micron
Anti-Aliasing Filter
22. 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
Lightpipe
Blu-Ray
Anti-Imaging Filter
Gain Staging
23. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital
Audio Engineering Society
Sine Wave
Variable Bit Rate
Quantization Error
24. Level above which audible sounds are painful (125 - 130 db)
Spectrum Multiplication
Sine Wave
Threshold of Pain
Oversampling
25. 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
Sawtooth Wave
MONO
Square Wave
SACD
26. 1.) Taking a series of evenly- spaced measurements 2.) Signal contains no frequency components higher than half the sample rate
Voltage
Requirements for A/D Conversion
Nyquist Frequency
Constant Bit Rate
27. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission
DVD-5
0 dB FS
Analog
Quantization Intervals
28. Have odd numbered harmonics
Square Wave
Blu-Ray
Physical Disc Format
Digital
29. 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.
Successive Approximation
Square Wave
Zero-Latency Monitoring
Word Clock
30. 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
Glass Master
DVD-Audio
Pass Band
Successive Approximation
31. The continuous loss of signal strengths as a signal travels through a medium
Pad Head & Tail
Attenuation
Digital
Threshold of Pain
32. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!
AES3
DVD-9
Sine Wave
Constant Bit Rate
33. 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
Acoustics
DVD-18
Psychoacoustics
Oversampling
34. EDL; Final list of samples used in the audio editing process; Identified by time code
Edit Decision List
Pad Head & Tail
Normalizing
Claude Shannon
35. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Sampling Theorem
6 dB
Dolby 5.1
Delta-Sigma Modulation
36. The frequency above or below which attenuation begins in a filter circuit
Index of Reflectivity
Dolby 7.1
Cutoff Frequency
Amplitude Accuracy
37. 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
Buffer Size
Footroom
A/D Conversion Signal Flow
Sampling (Samples)
38. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Nanometer
CPU Buffering
RMS
EtherSound
39. 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
TOSLINK
RMS Meter
Nyquist Frequency
40. 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
Buffer Size
Gain Staging
Jitter
Photoreceptor
41. Visual graph that shows how loud a sound is at different frequencies
I/O Connection Buffering
EtherSound
Sonogram
Jitter
42. 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
Constant Bit Rate
Buffering
Buffer Size
SACD
43. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics
Sony-Philips Digital Interface Format (S/PDIF)
DVD-14
Equal Loudness Contour
Additive Synthesis...
44. 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
Fourier Series
Digital
Pulse Width Modulation
RMS Meter
45. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Bit Depth
Cutoff Frequency
Joseph Fourier
Decoder
46. 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
Base 2 System
Quantization Error
Ethernet
Sonogram
47. MPEG; Standardizing body of audio coding
Glass Master
Motion Pictures Experts Group
Index of Reflectivity
Analog
48. 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
Sampling Rule
Coaxial
RMS Meter
Interpolation Filter
49. 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)
Pulse Density Modulation
Compression
CPU Buffering
50. 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
Physical Disc Format
Tascam Digital Interface Format (TDIF)
Bit Depth
Non -Compressed Audio Data Rate Formula