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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. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Buffer Size
Pulse Code Modulation
Sinusoidal
EtherSound
2. Industry Standards: -6 dB Peak = -20 RMS Meter
Sinusoidal
Recording Levels
Pass Band
Fletcher- Munson Curve
3. 'Reconstructing' part of digital audio
Glass Master
Digital
D/A Conversion
Playback Buffering
4. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!
AES3
Lossy Formats
Sampling (Samples)
Cutoff Frequency
5. EBU
CPU Buffering
European Broadcasting Union
Recording Levels
Anti-Aliasing Filter
6. Having a repeated succession of waves or curves as in a sound waveform
Bit Depth
Quantization
Sinusoidal
Glass Master
7. Stores only one copy of a stereo signal and assigns it to both channels in order to save 50% of original bandwidth
Frequency
Redither
DVD-Audio
Inter-Channel Redundancy
8. Method used in digital recording and reproduction in which a signal is sampled at various points and the resulting value is translated into binary numbers
Pulse Code Modulation
Index of Reflectivity
A/D Conversion Signal Flow
I/O Connection Buffering
9. Multi-Bit Words; (Pulse Code Modulation)
Cutoff Frequency
Exponent
PCM
Fidelity
10. Very selective method of lowering buffer levels by halting different levels of audio processing
Low-Latency Monitoring
Coaxial
Optical Cable
Tascam Digital Interface Format (TDIF)
11. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3
Sony-Philips Digital Interface Format (S/PDIF)
Additive Synthesis...
Recording Levels
Impulse Response
12. 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
Intensity Stereo
Glass Master
Frames
Pulse Code Modulation
13. A network communications protocol that specifies how machines will exchange data; Uses a broadcast system in which one machine transmits its message on the communication medium and the other machines listen for messages directed to them
Claude Shannon
Nanometer
Zero-Latency Monitoring
Ethernet
14. French mathematician that noted that any complex sound can be broken down into a series of component pure tones
dB/FS
DVD-Audio
Joseph Fourier
Interpolation Filter
15. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
Sawtooth Wave
Glass Master
DVD-Audio
Conversion Buffering
16. Toshiba developed digital audio interface utilizes fiber optics as a transmission medium.
Overflow
Resolution
Compression
TOSLINK
17. 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
Interleaved
Base 2 System
Adaptive Pulse Code Modulation
18. The number of compressions or rarefactions in one second; The higher the frequency the more compressions & rarefactions per second; Measured in Hertz
Recording Levels
Frequency
Inter-Channel Redundancy
Nanometer
19. Accuracy with which an electronic system reproduces the sound or image of its input signal
Entropy Coding
Fidelity
Pass Band
Micron
20. 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
Successive Approximation
dB/SPL
Sample Rate Effect on Anti-Aliasing
Gain Staging
21. A digital filter's time domain output sequence when the input is a single sample is input
Gain Staging
Jitter
Sampling Theorem
Impulse Response
22. More accuracy in low amplitudes and less in higher amplitudes
RMS Meter
Amplitude Accuracy
Intensity Stereo
Sample Rate
23. Serial Copy Management System; main difference between AES3 & S/PIDF
Successive Approximation
Joseph Fourier
Y-Axis Terminology
SCMS
24. 16-Bit; 44.1 kHz; PCM; Stereo
dB/FS
I/O Connection Buffering
Impulse Response
Requirements for CD Audio
25. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Non -Compressed Audio Data Rate Formula
Quantization Intervals
Significand
Blu-Ray
26. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Edit Decision List
Optical Cable
Digital Signal Processing
Joint Stereo
27. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Decimal- to-Binary Conversion
Dolby 5.1
Spectrum Multiplication
Fletcher- Munson Curve
28. 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
AES3
Intensity Stereo
Impulse Response
Analog
29. Reference voltage determined by summing the voltage values of a predetermined number of previous samples; Numbers of 1 in row = waveform peak; Numbers of 0 in row = waveform trough; Basis of Sony's Direct Stream Digital (DSD)
Jitter
MONO
Pulse Density Modulation
Red Book
30. Based on psychoacoustics - these are the basis of frequency analysis for a perceptual codec;
Successive Approximation
Subbands
Intensity Stereo
Threshold of Hearing
31. The continuous loss of signal strengths as a signal travels through a medium
A/D Conversion Signal Flow
Adaptive Pulse Code Modulation
Successive Approximation
Attenuation
32. Built into DAWs; Bits are added when signals are mixed together to avoid clipping
Buffering Locations
Compression
X-Axis Terminology
Headroom Bits
33. Difference in brightness between land and pit on a CD Physical Format
Lossy
Perceptual Coding
Index of Reflectivity
Nyquist Frequency
34. MPEG; Standardizing body of audio coding
Motion Pictures Experts Group
Constant Bit Rate
Direct Monitoring
Pad Head & Tail
35. Measure of the amplitude of a longitudinal wave
Intensity
Quantization Intervals
Dithering
Quantization
36. Most significant lossless coding technique in current use; Measure of disorder in which long strings of data are represented by short symbols and uses the shortest symbols to represent the most common repetitive audio data maximizing data reduction
Entropy Coding
Peak Level
MONO
RMS
37. 'Capturing' part of digital audio; Never captures a signal perfectly
Normalizing
dB/FS
A/D Conversion
CPU Buffering
38. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates
Footroom
Joseph Fourier
Delta-Sigma Modulation
Latency
39. 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
Nyquist Frequency
Quantizer
Oscillation
Y-Axis Terminology
40. 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
Non -Compressed Audio Data Rate Formula
Normalizing
Logical Format
Exponent
41. The difference in volume between the loudest and quietest sounds of a source
dBFS
Dynamic Range
Masking Analysis...
Red Book
42. 15.9 GB; DS/DL
Cutoff Frequency
Multichannel Audio Digital Interface (MADI)
Equal Loudness Contour
DVD-18
43. The amount of energy at each wavelength
Logical Format
Entropy Coding
Spectra
Resolution
44. 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
Masking Analysis...
PCM
Morse Code
Jitter
45. 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
Zero-Latency Monitoring
Logical Format
Sawtooth Wave
CPU Buffering
46. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Acoustics
Edit Decision List
Peak Level
Buffer Size
47. EDL; Final list of samples used in the audio editing process; Identified by time code
Footroom
Edit Decision List
Noise Shaping
DVD-10
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
Jitter
AoE Formats
0 dB FS
Optical Cable
49. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics
Speed of Sound
Oversampling
Additive Synthesis...
Quantization Error
50. How Loud (Y-Axis) & How Fast (X-Axis)
2 Dimensions of Sound
dB/FS
Psychoacoustics
Direct Monitoring