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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. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Sample- and-Hold
Acoustics
Tascam Digital Interface Format (TDIF)
Nyquist Frequency
2. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
Frequency
dB/SPL
Bit Depth
Oscillation
3. The difference in volume between the loudest and quietest sounds of a source
Aliasing
Dynamic Range
AES3
Buffering
4. Digital Word -> Series of Resistors (each with assigned charges) -> Sample- and-Hold Circuit -> Anti-Imaging Filter (Smoothing Filter) -> Reconstructed Sample
D/A Conversion Signal Flow
Variable Bit Rate
Harmonic Content
Sony-Philips Digital Interface Format (S/PDIF)
5. 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
DVD-Audio
Peak Level
Sample Rate Effect on Anti-Aliasing
Pulse Code Modulation
6. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form
Digital Signal Processing
Threshold of Pain
Compression
Threshold of Hearing
7. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Signal- to- Noise Ratio
Decoder
A/D Conversion
M-S Stereo
8. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'
Joint Stereo
Sinusoidal
Transfer Protocol
Decimation Filter
9. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Buffering Locations
Footroom
Acoustics
AoE Formats
10. The amount of energy at each wavelength
Signal- to- Noise Ratio
Spectra
PCM
Headroom Bits
11. 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
Red Book
Square Wave
Nyquist Frequency
RMS Meter
12. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Dolby 5.1
Physical Disc Format
Sonogram
Zero-Latency Monitoring
13. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Latency
Digital
Quantization Error
Glass Master
14. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Bit Rate
RMS
Sampling (Samples)
Rarefaction
15. The frequency range that is allowed through a filter
Sample Rate Effect on Anti-Aliasing
Internal Resolution
Pass Band
Sampling Theorem
16. Same as 'aliasing'
Interpolation Filter
AoE Formats
Foldover
Class - D Amplifier
17. 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
Fletcher- Munson Curve
Data Packing
Average Bit Rate
Entropy Coding
18. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size
Buffering Locations
Codec
D/A Conversion
Decimal- to-Binary Conversion
19. 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
Claude Shannon
Base 2 System
Foldover
Pulse Code Modulation
20. 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
EtherSound
Playback Buffering
Cutoff Frequency
21. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics
Harmonic Content
Sampling Theorem
Convolution
Threshold of Hearing
22. Mixing data and control characters in a single operation
Intensity Stereo
Interleaved
Compression
Digital
23. 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)
Oscillation
dB/SPL
Lossy
Fletcher- Munson Curve
24. 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
Oversampling
Harry Nyquist
Speed of Sound
Audio over Ethernet (AoE)
25. Difference in brightness between land and pit on a CD Physical Format
Speed of Sound
Dolby 5.1
EtherSound
Index of Reflectivity
26. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Storage Conversion Steps
Blu-Ray
Glass Master
Peak Level
27. 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
Optical Cable
Significand
Gain Staging
Amplitude Accuracy
28. 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
Overflow
Pass Band
Fourier Series
Perceptual Coding
29. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Perceptual Coding
Sample Rate Effect on Anti-Aliasing
Buffering Locations
Sine Wave
30. A method of representing real numbers using a mantissa and an exponent
Lossless
Floating Point
I/O Connection Buffering
Frequency
31. 'Reconstructing' part of digital audio
Entropy Coding
D/A Conversion
Interleaved
Decoder
32. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks
Floating Point
Headroom Bits
CobraNet
PCM
33. Eight channel digital surround sound system by Dolby
Decimal- to-Binary Conversion
Dolby 7.1
Joseph Fourier
DVD-18
34. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage
SCMS
Lossless
Quantizer
Jitter
35. Leaving space at beginning and ending of song for data crunching during mastering; Last step in mastering process
Pad Head & Tail
Entropy Coding
Quantization Intervals
Square Wave
36. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC
Index of Reflectivity
Intensity Stereo
Lossless Formats
Subbands
37. VBR; Most common & best data reduction technique; Codecs that encode data by determining how dense or sparse areas of the audio are; Can result in buffering issues
Fidelity
DVD-14
Variable Bit Rate
Rarefaction
38. Toshiba developed digital audio interface utilizes fiber optics as a transmission medium.
Quantizer
X-Axis Terminology
D/A Conversion
TOSLINK
39. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Compression
Fletcher- Munson Curve
Optical Cable
Recording Levels
40. Sony sigma- delta modulation based technology that bypasses the decimation and interpolation steps found in PCM converters
Additive Synthesis...
Direct Stream Digital
Lossless Formats
Blu-Ray
41. 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
Average Bit Rate
Sample Rate
Amplitude Accuracy
Playback Buffering
42. 7.95 GB; SS/DL
Physical Disc Format
Nanometer
DVD-9
Dolby 5.1
43. Multi-Bit Words; (Pulse Code Modulation)
RMS Meter
Aliasing
PCM
Nyquist Frequency
44. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector
Optical Cable
Bit Depth Effect on Dynamic Range
Multichannel Audio Digital Interface (MADI)
Convolution
45. Have odd numbered harmonics
I/O Connection Buffering
Audio Engineering Society
M-S Stereo
Square Wave
46. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Glass Master
RMS Meter
DVD-10
Buffer Size
47. 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.
SACD
Aliasing
Quantization Error
Floating Point
48. Father of modern information theory; Solidified the Nyquist Theory by adding the concept that bits per second (binary representation of audio signals) must be at equal intervals to accurately represent data
DVD-18
Claude Shannon
Oscillation
Significand
49. Signal conversions are mixed with playback tracks resulting in near-zero latency
Quantization Error
Direct Monitoring
Audio Engineering Society
Equal Loudness Contour
50. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
Digital
Pulse Code Modulation
Sample Rate
TOSLINK