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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. Anytime bit depth is reduced the gap gets bigger so more dithering is required
Recording Levels
Redither
Micron
Requirements for A/D Conversion
2. 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
Multichannel Audio Digital Interface (MADI)
Edit Decision List
Equal Loudness Contour
Base 2 System
3. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)
Dynamic Range
Data Packing
A/D Conversion Signal Flow
Noise Shaping
4. Take up half as many bits (50%); Algorithm can keep same quality by lossing the stereo track
Multichannel Audio Digital Interface (MADI)
MONO
Overflow
Buffering
5. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude
Audio over Ethernet (AoE)
Interleaved
Decimal- to-Binary Conversion
Exponent
6. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio
Blu-Ray
Joint Stereo
Sample Rate
Buffer Size
7. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound
Floating Point
0 dB FS
DVD-Audio
RMS
8. A time regulator that makes all samples and bits to align when working with interconnected digital devices; Basically a signal that all of the digital devices refer to when operating.
Inter-Channel Redundancy
Buffering Locations
Word Clock
Logical Format
9. Fractional part of a floating- point number; Also called the mantissa; Defines precision
Photoreceptor
Bit Rate
Overflow
Significand
10. The frequency above or below which attenuation begins in a filter circuit
Multichannel Audio Digital Interface (MADI)
Sony-Philips Digital Interface Format (S/PDIF)
Cutoff Frequency
Dynamic Range
11. 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
Sample- and-Hold
Pulse Code Modulation
Additive Synthesis...
Bit Depth
12. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon
Stapedes Reflex
Sonogram
Convolution
Transfer Protocol
13. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio
AES3
Sonogram
Bit Depth
Decimation Filter
14. Sony sigma- delta modulation based technology that bypasses the decimation and interpolation steps found in PCM converters
Blu-Ray
Sawtooth Wave
Direct Stream Digital
Average Bit Rate
15. Waveform of a pure tone showing simple harmonic motion
Sine Wave
Voltage
Buffer Size
Digital
16. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Low-Latency Monitoring
Blu-Ray
Oversampling
Pulse Code Modulation
17. 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
D/A Conversion
DVD-9
Significand
Sampling Theorem
18. Sum of all harmonics; Sum of sine and cosine waves which have frequencies f - 2f - 3f - 4f...
DVD-10
Fourier Series
Analog
Pulse Code Modulation
19. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response
Lossless
Sawtooth Wave
Sampling Rule
CobraNet
20. Eliminates frequencies above the Nyquist limit from becoming samples; Occurs prior to quantization
DVD-9
RMS Meter
Anti-Aliasing Filter
Internal Resolution
21. Stores only one copy of a stereo signal and assigns it to both channels in order to save 50% of original bandwidth
Inter-Channel Redundancy
Foldover
Direct Stream Digital
Impulse Response
22. How Loud (Y-Axis) & How Fast (X-Axis)
Dolby 5.1
Threshold of Pain
2 Dimensions of Sound
Joseph Fourier
23. 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
Acoustics
Physical Disc Format
Bit Depth Effect on Dynamic Range
Spectrum Multiplication
24. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Digital
Nyquist Frequency
Entropy Coding
Morse Code
25. ADPCM; Pulse code modulation that produces a digital signal with a lower bit rate than standard PCM; Records only the difference between samples
DVD-10
Inter-Channel Redundancy
Adaptive Pulse Code Modulation
Quantization
26. Accuracy with which an electronic system reproduces the sound or image of its input signal
Quantization
Fidelity
Playback Buffering
Micron
27. Each bit in the bit depth is equal to a _____ increase in dynamic range
Audio Engineering Society
6 dB
SCMS
Quantization
28. 12.33 GB; DS/ML
Additive Synthesis...
Pad Head & Tail
Codec
DVD-14
29. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Constant Bit Rate
Audio Engineering Society
EtherSound
Dolby 5.1
30. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode
Decoder
Recording Levels
Tascam Digital Interface Format (TDIF)
Sample Rate Effect on Anti-Aliasing
31. Visual graph that shows how loud a sound is at different frequencies
Delta-Sigma Modulation
Pulse Density Modulation
Class - D Amplifier
Sonogram
32. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored
Conversion Buffering
Voltage
Y-Axis Terminology
Psychoacoustics
33. 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
Oversampling
Non -Compressed Audio Data Rate Formula
Frames
Average Bit Rate
34. Contains all even and odd harmonics associated with a fundamental tone - making it a rich source for modeling other sounds; Amplitude of each overtone decreases exponentially as a ratio of the harmonic's frequency to that of the fundamental
Sine Wave
Sawtooth Wave
Buffer Size
Convolution
35. 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
Intensity
DVD-Audio
Sampling Theorem
36. 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'
Latency
EtherSound
Fidelity
Rarefaction
37. High Pressure - Part of a longitudinal wave where the particles of the medium are close together
Digital Signal Processing
Headroom Bits
Impulse Response
Compression
38. Splits the input signal and mixes it with an analog copy so that no latency is present
Zero-Latency Monitoring
Normalizing
I/O Connection Buffering
Sonogram
39. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.
Y-Axis Terminology
CPU Buffering
Harry Nyquist
Direct Monitoring
40. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm
Blu-Ray
Playback Buffering
Intensity Stereo
Oscillation
41. Digital (binary) measurements of how long each pulse is either on or off; Width of increasing voltage or decreasing voltage is assigned a 1 or 0 respectively
Sample Rate Effect on Anti-Aliasing
Pulse Width Modulation
D/A Conversion
dB/SPL
42. RAM holds in memory audio data before it is transferred to the memory controller; Certain amount of data is processed before large amounts of data are streamed to prevent latency
Interpolation Filter
Buffering
Sampling (Samples)
Sine Wave
43. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Claude Shannon
Decoder
Intensity
Quantization Intervals
44. Having a repeated succession of waves or curves as in a sound waveform
Cutoff Frequency
Aliasing
Oversampling
Sinusoidal
45. EDL; Final list of samples used in the audio editing process; Identified by time code
Quantizer
Edit Decision List
Lossy
Cutoff Frequency
46. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage
Quantizer
DVD-Audio
Transfer Protocol
Perceptual Coding
47. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range
Index of Reflectivity
Physical Disc Format
Y-Axis Terminology
Exponent
48. CobraNet; EtherSound; Dante; AVB (currently under development)
Convolution
Harry Nyquist
Dolby 5.1
AoE Formats
49. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Internal Resolution
Footroom
TOSLINK
Stapedes Reflex
50. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits
Masking Analysis...
Impulse Response
Red Book
DVD-18