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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. Having a repeated succession of waves or curves as in a sound waveform
Sinusoidal
Digital Signal Processing
Morse Code
Coaxial
2. The frequency range that is allowed through a filter
Pass Band
Quantizer
Subbands
Bit Depth
3. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated
Voltage
Significand
I/O Connection Buffering
Dolby 5.1
4. Eight channel digital surround sound system by Dolby
Dolby 7.1
Analog
Pulse Code Modulation
Cutoff Frequency
5. 7.95 GB; SS/DL
Edit Decision List
Analog
DVD-9
DVD-5
6. Splits the input signal and mixes it with an analog copy so that no latency is present
Successive Approximation
Motion Pictures Experts Group
Zero-Latency Monitoring
Inter-Channel Redundancy
7. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission
Floating Point
Masking Analysis...
Multichannel Audio Digital Interface (MADI)
Analog
8. Psychoacoustic model of data reduction used for general audio compression that aims to transmit only features perceptible to the human ear; Useful for mastering streaming media
Dolby 7.1
Perceptual Coding
Non -Compressed Audio Data Rate Formula
Attenuation
9. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
Attenuation
Fletcher- Munson Curve
Resolution
Equal Loudness Contour
10. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Attenuation
Equal Loudness Contour
Sampling Rule
Tascam Digital Interface Format (TDIF)
11. The set of rules that computers use to move files from one computer to another on an internet
Noise Shaping
Coaxial
Significand
Transfer Protocol
12. Electromagnetic receptor that detects the radiation known as visible light
TOSLINK
Oscillation
Requirements for A/D Conversion
Photoreceptor
13. 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
dB/SPL
Average Bit Rate
Bit Depth Effect on Dynamic Range
CPU Buffering
14. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Foldover
Stapedes Reflex
Oversampling
DVD-5
15. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel
SACD
Physical Disc Format
Acoustics
Pulse Code Modulation
16. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
RMS Meter
Signal- to- Noise Ratio
Base 2 System
Compression
17. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage
Quantizer
Harmonic Content
Sampling Rule
Audio Engineering Society
18. 8.75 GB; DS/SL
Red Book
DVD-10
Cutoff Frequency
Joint Stereo
19. 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
Joint Stereo
Intensity
Intensity Stereo
Lossless Formats
20. 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
Coaxial
Harry Nyquist
Noise Shaping
DVD-10
21. The number of compressions or rarefactions in one second; The higher the frequency the more compressions & rarefactions per second; Measured in Hertz
Transfer Protocol
Frequency
Bit Depth Effect on Dynamic Range
I/O Connection Buffering
22. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC
Lossless Formats
TOSLINK
Compression
Lossy Formats
23. 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
Anti-Aliasing Filter
Bit Depth
Coaxial
24. 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
Glass Master
Lossless Formats
Storage Conversion Steps
Compression
25. Amplitude meter that takes the square root of all instantaneous amplitudes and averages them to find a mean and squares that value; Useful with particularly complex waveforms
RMS Meter
Pulse Density Modulation
Significand
Direct Monitoring
26. 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.
Aliasing
Oscillation
Claude Shannon
Adaptive Pulse Code Modulation
27. Decibels Full Scale
Pass Band
dBFS
Resolution
MONO
28. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating
Effective Bit Depth
D/A Conversion Signal Flow
Requirements for CD Audio
Square Wave
29. Level above which audible sounds are painful (125 - 130 db)
Threshold of Pain
Exponent
Masking Analysis...
Interpolation Filter
30. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Spectrum Multiplication
Blu-Ray
DVD-Audio
Cutoff Frequency
31. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)
Logical Format
Audio Engineering Society
A/D Conversion Signal Flow
Pass Band
32. Each bit in the bit depth is equal to a _____ increase in dynamic range
Additive Synthesis...
Average Bit Rate
Masking Analysis...
6 dB
33. The loudest point of a Full Scale system
Additive Synthesis...
Logical Format
Inter-Channel Redundancy
0 dB FS
34. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates
PCM
Delta-Sigma Modulation
DVD-5
Physical Disc Format
35. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Harmonic Content
Anti-Imaging Filter
Acoustics
RMS
36. 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
Optical Cable
Decimation Filter
Joseph Fourier
37. A digital filter's time domain output sequence when the input is a single sample is input
Impulse Response
Bit Rate
DVD-14
Dithering
38. The difference in volume between the loudest and quietest sounds of a source
EtherSound
Subbands
Audio Engineering Society
Dynamic Range
39. Unit of measurement that is equal to one billionth of a meter
M-S Stereo
Latency
Joseph Fourier
Nanometer
40. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
A/D Conversion Signal Flow
X-Axis Terminology
Sony-Philips Digital Interface Format (S/PDIF)
Conversion Buffering
41. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
Psychoacoustics
Joseph Fourier
Multichannel Audio Digital Interface (MADI)
AES3
42. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
Sample- and-Hold
Index of Reflectivity
Optical Cable
DVD-Audio
43. Method of sampling data at a higher resolution (higher sample rate) as a means of reducing harmonic content during D/A conversion; (x2) oversampling gets rid of all odd harmonic content
Quantization Error
Jitter
Transfer Protocol
Oversampling
44. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit
X-Axis Terminology
Convolution
Successive Approximation
Anti-Aliasing Filter
45. 15.9 GB; DS/DL
Lightpipe
Rarefaction
2 Dimensions of Sound
DVD-18
46. The frequency above or below which attenuation begins in a filter circuit
Sawtooth Wave
Oscillation
Cutoff Frequency
Overflow
47. Industry Standards: -6 dB Peak = -20 RMS Meter
Transfer Protocol
Joseph Fourier
Recording Levels
Optical Cable
48. Sample Rate x Bit Depth x # of Channels
Overflow
Photoreceptor
Non -Compressed Audio Data Rate Formula
Dithering
49. Also known as equal loudness curves; Graph that indicates the average ear sensitivity to different frequencies at different SPL levels (as volume increases - these curves flatten out)
Buffering Locations
Voltage
Fletcher- Munson Curve
Redither
50. Ratio of magnitude of the analytical signal to the magnitude of the background noise signal
Micron
Signal- to- Noise Ratio
Effective Bit Depth
Joint Stereo