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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. Digital Word -> Series of Resistors (each with assigned charges) -> Sample- and-Hold Circuit -> Anti-Imaging Filter (Smoothing Filter) -> Reconstructed Sample
Oscillation
MONO
Quantization Intervals
D/A Conversion Signal Flow
2. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Buffer Size
Tascam Digital Interface Format (TDIF)
Optical Cable
dB/SPL
3. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital
Delta-Sigma Modulation
Ethernet
Quantization Error
Exponent
4. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Digital
Internal Resolution
Red Book
Effective Bit Depth
5. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones
DVD-9
Equal Loudness Contour
Nyquist Frequency
Rarefaction
6. Toshiba developed digital audio interface utilizes fiber optics as a transmission medium.
Decoder
TOSLINK
D/A Conversion
Cutoff Frequency
7. 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
Data Packing
Algorithm
Threshold of Pain
dB/FS
8. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
DVD-18
Decoder
Sampling (Samples)
Digital Signal Processing
9. Measure of the amplitude of a longitudinal wave
Intensity
Psychoacoustics
Buffering
Sample Rate Effect on Anti-Aliasing
10. 15.9 GB; DS/DL
Codec
Photoreceptor
Sample- and-Hold
DVD-18
11. Describes various optical disc characteristics including the size and shape of the disc - the size of pits - the speed at which the disc spins - and a multitude of aspects regarding the specifications of the player itself
Joseph Fourier
Pulse Width Modulation
Physical Disc Format
Recording Levels
12. 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
Recording Levels
Amplitude Accuracy
Quantization Intervals
13. Visual graph that shows how loud a sound is at different frequencies
Sine Wave
Storage Conversion Steps
Sonogram
Audio over Ethernet (AoE)
14. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Y-Axis Terminology
Multichannel Audio Digital Interface (MADI)
Psychoacoustics
MONO
15. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.
M-S Stereo
Normalizing
Harry Nyquist
EtherSound
16. Increases D/A sample rate from nominal rate to oversampling rate by turning series multi- bit PCM samples into 1- bit samples; (ex. => 44.1kHz sample rate converted to 2.8MHz and simultaneously converts multi- bit samples to 1- bit); Low Pass Filter
Physical Disc Format
Dolby 7.1
Interpolation Filter
Claude Shannon
17. AES
Floating Point
Bit Depth
Audio Engineering Society
Oversampling
18. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission
Analog
Sinusoidal
Internal Resolution
Intensity Stereo
19. 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
Sony-Philips Digital Interface Format (S/PDIF)
Compression
DVD-10
20. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Quantization Error
Decimation Filter
Micron
Internal Resolution
21. 'Reconstructing' part of digital audio
Pulse Density Modulation
D/A Conversion
Glass Master
Voltage
22. 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)
Jitter
Digital Signal Processing
Dolby 7.1
Fletcher- Munson Curve
23. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Interleaved
Compression
Frequency
Cutoff Frequency
24. The elapsed time it takes for a packet of data to arrive at its destination; Lagging or pause of an audio signal as digital processing occurs; Can be managed utilizing several forms of 'audio monitoring'
Redither
Latency
Decimation Filter
Logical Format
25. Perceptual coding technique that uses louder sounds of a similar frequency to decide what information is to be saved during data reduction
Masking Analysis...
Blu-Ray
Stapedes Reflex
Anti-Aliasing Filter
26. A frequency specified for a filter (digital or electronic) the marks the point at which the frequency content of a signal is altered +/- 3dB
Sony-Philips Digital Interface Format (S/PDIF)
Intensity Stereo
Cutoff Frequency
Impulse Response
27. Waveform of a pure tone showing simple harmonic motion
Sonogram
Sine Wave
Joint Stereo
Physical Disc Format
28. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics
Harmonic Content
Recording Levels
Delta-Sigma Modulation
Optical Cable
29. Eliminates frequencies above the Nyquist limit from becoming samples; Occurs prior to quantization
Intensity Stereo
Noise Shaping
Anti-Aliasing Filter
Index of Reflectivity
30. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Dolby 5.1
Oscillation
Micron
Audio over Ethernet (AoE)
31. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
DVD-Audio
X-Axis Terminology
Anti-Imaging Filter
Index of Reflectivity
32. 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
Cutoff Frequency
X-Axis Terminology
Normalizing
Successive Approximation
33. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC
Footroom
Lossy Formats
Digital
Lossless Formats
34. Have odd numbered harmonics
Direct Monitoring
Effective Bit Depth
Impulse Response
Square Wave
35. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
Adaptive Pulse Code Modulation
A/D Conversion Signal Flow
Perceptual Coding
Oscillation
36. Industry Standards: -6 dB Peak = -20 RMS Meter
Interleaved
Impulse Response
Delta-Sigma Modulation
Recording Levels
37. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude
Direct Stream Digital
Exponent
A/D Conversion
Lossy Formats
38. 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
Blu-Ray
Base 2 System
Edit Decision List
Lossy
39. Used when the reference pressure of a sound is 20 microPa (0.00002); Sound Pressure Level; Measure of amplitude
dB/SPL
Sine Wave
Nanometer
Buffer Size
40. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Low-Latency Monitoring
Blu-Ray
Threshold of Hearing
Jitter
41. 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
Ethernet
CPU Buffering
Lossless
DVD-10
42. Branch of psychology concerned with the subjective perception of sound
Latency
Oversampling
Impulse Response
Psychoacoustics
43. 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
Logical Format
Redither
RMS Meter
Ethernet
44. 7.95 GB; SS/DL
European Broadcasting Union
DVD-9
Decimation Filter
CobraNet
45. 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
Exponent
Recording Levels
Sample- and-Hold
46. Smallest interval measurable by a scientific instrument; Defined by bit rate (sample rate x bit depth)
RMS
Resolution
Adaptive Pulse Code Modulation
Impulse Response
47. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Stapedes Reflex
DVD-5
Fidelity
Blu-Ray
48. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
Sample Rate
Bit Depth
Playback Buffering
Masking Analysis...
49. The frequency above or below which attenuation begins in a filter circuit
Photoreceptor
Cutoff Frequency
Resolution
Jitter
50. Serial Copy Management System; main difference between AES3 & S/PIDF
D/A Conversion Signal Flow
SCMS
TOSLINK
Zero-Latency Monitoring