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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. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector
Lightpipe
Harmonic Content
Amplitude Accuracy
Audio Engineering Society
2. Unit of measurement that is equal to one millionth of a meter
Quantizer
A/D Conversion Signal Flow
European Broadcasting Union
Micron
3. Accuracy with which an electronic system reproduces the sound or image of its input signal
Fidelity
Sinusoidal
Direct Monitoring
Significand
4. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Equal Loudness Contour
Joint Stereo
Sampling Theorem
DVD-18
5. More accuracy in low amplitudes and less in higher amplitudes
Amplitude Accuracy
Intensity
Lossless
CPU Buffering
6. Waveform of a pure tone showing simple harmonic motion
Sine Wave
Lossless
CobraNet
DVD-5
7. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!
Normalizing
Fletcher- Munson Curve
AES3
DVD-9
8. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel
SACD
TOSLINK
Micron
Requirements for A/D Conversion
9. 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
Glass Master
Cutoff Frequency
Sample Rate Effect on Anti-Aliasing
Rarefaction
10. A method of representing real numbers using a mantissa and an exponent
Oscillation
Coaxial
Floating Point
Sampling (Samples)
11. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Sampling Rule
Square Wave
Resolution
Significand
12. ADPCM; Pulse code modulation that produces a digital signal with a lower bit rate than standard PCM; Records only the difference between samples
Joseph Fourier
Adaptive Pulse Code Modulation
Acoustics
Nanometer
13. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Acoustics
Codec
Algorithm
Oversampling
14. The frequency range that is allowed through a filter
Cutoff Frequency
Sampling Rule
Interleaved
Pass Band
15. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
CobraNet
D/A Conversion
Ethernet
Masking Analysis...
16. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Gain Staging
Exponent
Sawtooth Wave
Sampling Rule
17. 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
Sampling (Samples)
Blu-Ray
Frames
18. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
Sample Rate
Oscillation
Foldover
Oversampling
19. 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
Algorithm
Nyquist Frequency
Interpolation Filter
Quantizer
20. 16-Bit; 44.1 kHz; PCM; Stereo
Quantization Error
Requirements for CD Audio
2 Dimensions of Sound
Interleaved
21. 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
Decimation Filter
Signal- to- Noise Ratio
Storage Conversion Steps
Low-Latency Monitoring
22. 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
Cutoff Frequency
Average Bit Rate
RMS Meter
Acoustics
23. The continuous loss of signal strengths as a signal travels through a medium
Overflow
Attenuation
Buffering Locations
RMS
24. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Nanometer
CPU Buffering
0 dB FS
Y-Axis Terminology
25. 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
6 dB
Decimation Filter
SACD
Oversampling
26. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating
Oversampling
Fletcher- Munson Curve
Audio Engineering Society
Effective Bit Depth
27. 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
Digital Signal Processing
2 Dimensions of Sound
Compression
28. The more bits allocated during quantization - the more accurate the measurement
Spectra
Direct Monitoring
dBFS
Bit Depth Effect on Dynamic Range
29. Serial Copy Management System; main difference between AES3 & S/PIDF
SCMS
0 dB FS
Direct Stream Digital
MONO
30. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Impulse Response
Blu-Ray
Dolby 7.1
dB/SPL
31. Smallest interval measurable by a scientific instrument; Defined by bit rate (sample rate x bit depth)
Latency
Non -Compressed Audio Data Rate Formula
DVD-9
Resolution
32. The frequency above or below which attenuation begins in a filter circuit
Rarefaction
Exponent
Cutoff Frequency
Additive Synthesis...
33. Root Mean Square; Refers to taking the square root of all instantaneous amplitudes; Takes the average of those squares; (-6 Peak Level is approximately equal to -20 RMS)
Overflow
RMS
Perceptual Coding
DVD-10
34. 12.33 GB; DS/ML
Harmonic Content
Base 2 System
DVD-14
Micron
35. A situation where a calculated value cannot fit into the number of digits reserved for it
DVD-18
Bit Rate
Overflow
AoE Formats
36. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Requirements for A/D Conversion
Logical Format
Buffering Locations
Pad Head & Tail
37. 7.95 GB; SS/DL
Optical Cable
Pass Band
Additive Synthesis...
DVD-9
38. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital
Lossless Formats
Anti-Imaging Filter
Quantization Error
Interpolation Filter
39. 8- in/8- out on one cable; 25- pin D- sub connector
Peak Level
Glass Master
Threshold of Pain
Tascam Digital Interface Format (TDIF)
40. CBR; Codecs encodes data at a constant rate regardless of density of the audio file
Inter-Channel Redundancy
Perceptual Coding
Delta-Sigma Modulation
Constant Bit Rate
41. Very quiet digital amplifier that produces a series of output pulses with the audio signal coded the same as the width of the output pulses; Pulses are used to represent wave forms and are either on or off; Intense signals have long pulses with short
Tascam Digital Interface Format (TDIF)
Class - D Amplifier
Intensity Stereo
Dithering
42. CobraNet; EtherSound; Dante; AVB (currently under development)
Cutoff Frequency
AoE Formats
DVD-9
Aliasing
43. Branch of psychology concerned with the subjective perception of sound
Psychoacoustics
Sample Rate
Compression
dB/SPL
44. Same as 'aliasing'
Foldover
Redither
I/O Connection Buffering
Cutoff Frequency
45. AES
Threshold of Hearing
Audio Engineering Society
Equal Loudness Contour
Voltage
46. The amount of energy at each wavelength
Index of Reflectivity
Spectra
Oversampling
Micron
47. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
A/D Conversion Signal Flow
Lossless
Dolby 5.1
Multichannel Audio Digital Interface (MADI)
48. 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
Subbands
Sonogram
Gain Staging
0 dB FS
49. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
I/O Connection Buffering
Logical Format
DVD-18
Sample Rate Effect on Anti-Aliasing
50. 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
Jitter
Stapedes Reflex
Blu-Ray
Red Book