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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
.
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
DVD-10
Base 2 System
Lossless
DVD-18
2. Allowance of noise floor below that which is required for the final product
Frequency
Dolby 7.1
Analog
Footroom
3. Each bit in the bit depth is equal to a _____ increase in dynamic range
Headroom Bits
Significand
Subbands
6 dB
4. 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
Fletcher- Munson Curve
DVD-5
Headroom Bits
Morse Code
5. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Buffering Locations
Decimation Filter
Spectrum Multiplication
DVD-5
6. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Joint Stereo
Buffering Locations
CPU Buffering
Subbands
7. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Morse Code
Decoder
Stapedes Reflex
Spectrum Multiplication
8. 'Capturing' part of digital audio; Never captures a signal perfectly
Significand
Sample- and-Hold
RMS Meter
A/D Conversion
9. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates
Threshold of Pain
Rarefaction
Delta-Sigma Modulation
Inter-Channel Redundancy
10. EBU
Rarefaction
Sinusoidal
M-S Stereo
European Broadcasting Union
11. Difference in brightness between land and pit on a CD Physical Format
Jitter
Non -Compressed Audio Data Rate Formula
D/A Conversion
Index of Reflectivity
12. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.
Harry Nyquist
DVD-9
Sine Wave
DVD-10
13. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Acoustics
Lossy Formats
Analog
Redither
14. 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)
Pulse Code Modulation
Zero-Latency Monitoring
Audio over Ethernet (AoE)
Pulse Density Modulation
15. Improper (false) sampling of high frequencies that cause much lower frequencies to be produced when the audio is reconstructed; Foldover happens at higher frequencies as harmonics reach levels that exceed the Nyquist limit.
Fletcher- Munson Curve
Sampling (Samples)
D/A Conversion Signal Flow
Aliasing
16. 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
Conversion Buffering
Overflow
Successive Approximation
CPU Buffering
17. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Algorithm
CPU Buffering
Foldover
Sony-Philips Digital Interface Format (S/PDIF)
18. 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
Fourier Series
Floating Point
Direct Monitoring
Optical Cable
19. French mathematician that noted that any complex sound can be broken down into a series of component pure tones
Joseph Fourier
I/O Connection Buffering
Coaxial
Gain Staging
20. 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
Entropy Coding
EtherSound
Sampling (Samples)
Buffer Size
21. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Y-Axis Terminology
Additive Synthesis...
Coaxial
Quantization
22. The continuous loss of signal strengths as a signal travels through a medium
Quantization
Logical Format
SCMS
Attenuation
23. ADPCM; Pulse code modulation that produces a digital signal with a lower bit rate than standard PCM; Records only the difference between samples
Data Packing
A/D Conversion
Pulse Density Modulation
Adaptive Pulse Code Modulation
24. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
Tascam Digital Interface Format (TDIF)
I/O Connection Buffering
Sample Rate Effect on Anti-Aliasing
Frequency
25. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
Multichannel Audio Digital Interface (MADI)
Edit Decision List
Physical Disc Format
DVD-18
26. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts
Intensity
PCM
dB/SPL
Voltage
27. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Quantization
Dynamic Range
Multichannel Audio Digital Interface (MADI)
Cutoff Frequency
28. Measure of the amplitude of a longitudinal wave
Footroom
Harmonic Content
European Broadcasting Union
Intensity
29. 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)
Adaptive Pulse Code Modulation
Multichannel Audio Digital Interface (MADI)
DVD-9
30. Waveform of a pure tone showing simple harmonic motion
Jitter
Joseph Fourier
Sine Wave
Dolby 7.1
31. Serial Copy Management System; main difference between AES3 & S/PIDF
Headroom Bits
Nyquist Frequency
SCMS
Speed of Sound
32. Level above which audible sounds are painful (125 - 130 db)
Index of Reflectivity
Nanometer
Data Packing
Threshold of Pain
33. If a signal is sampled at a rate higher than twice the highest significant signal frequency and at evenly spaced intervals - then the samples contain all the information of the original signal
Sampling Theorem
Cutoff Frequency
Frequency
Speed of Sound
34. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Pulse Code Modulation
Digital Signal Processing
Nanometer
Blu-Ray
35. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience
Non -Compressed Audio Data Rate Formula
Logical Format
Floating Point
Dynamic Range
36. 'Reconstructing' part of digital audio
dBFS
Lossy Formats
D/A Conversion
Frequency
37. Having a repeated succession of waves or curves as in a sound waveform
Requirements for A/D Conversion
dBFS
SCMS
Sinusoidal
38. Ratio of magnitude of the analytical signal to the magnitude of the background noise signal
Signal- to- Noise Ratio
Floating Point
Pulse Code Modulation
Dynamic Range
39. Visual graph that shows how loud a sound is at different frequencies
Sonogram
Buffer Size
Equal Loudness Contour
Anti-Aliasing Filter
40. 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
Optical Cable
Anti-Aliasing Filter
Class - D Amplifier
41. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Dolby 7.1
Sample- and-Hold
Sampling Rule
Intensity
42. EDL; Final list of samples used in the audio editing process; Identified by time code
Edit Decision List
Bit Depth Effect on Dynamic Range
Fletcher- Munson Curve
Successive Approximation
43. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Multichannel Audio Digital Interface (MADI)
Fidelity
Morse Code
Rarefaction
44. 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
CPU Buffering
Data Packing
Blu-Ray
Joint Stereo
45. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
DVD-Audio
Peak Level
Y-Axis Terminology
Algorithm
46. Digital Word -> Series of Resistors (each with assigned charges) -> Sample- and-Hold Circuit -> Anti-Imaging Filter (Smoothing Filter) -> Reconstructed Sample
DVD-Audio
Redither
Requirements for CD Audio
D/A Conversion Signal Flow
47. Have odd numbered harmonics
SCMS
Footroom
Cutoff Frequency
Square Wave
48. Removes high frequency images and noise and smoothes the stair case output coming from of the sample and hold circuit; Also called a SMOOTHING FILTER
Redither
European Broadcasting Union
A/D Conversion Signal Flow
Anti-Imaging Filter
49. Industry Standards: -6 dB Peak = -20 RMS Meter
Joint Stereo
D/A Conversion
Recording Levels
Speed of Sound
50. A digital filter's time domain output sequence when the input is a single sample is input
Pulse Code Modulation
Oversampling
Overflow
Impulse Response
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