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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. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software
Frequency
Buffering Locations
Dolby 7.1
Sampling Rule
2. Process that begins with a fast FFT analysis of the spectra of two input signals - then the multiplication of like frequencies - and IFFT to finalize the process
Spectrum Multiplication
Headroom Bits
Multichannel Audio Digital Interface (MADI)
Exponent
3. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution
Sony-Philips Digital Interface Format (S/PDIF)
Internal Resolution
Low-Latency Monitoring
M-S Stereo
4. 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.
Word Clock
SACD
Quantization Intervals
Glass Master
5. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Quantization Intervals
Algorithm
Voltage
Resolution
6. Branch of psychology concerned with the subjective perception of sound
Quantization Error
Anti-Aliasing Filter
Psychoacoustics
6 dB
7. Fractional part of a floating- point number; Also called the mantissa; Defines precision
A/D Conversion
Requirements for A/D Conversion
6 dB
Significand
8. 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
Sample Rate Effect on Anti-Aliasing
Decoder
Harmonic Content
Pad Head & Tail
9. More accuracy in low amplitudes and less in higher amplitudes
Peak Level
Requirements for A/D Conversion
Sinusoidal
Amplitude Accuracy
10. When recording you want the smallest buffer available; When mixing you want the largest buffer available
Morse Code
Buffer Size
Resolution
Oversampling
11. EDL; Final list of samples used in the audio editing process; Identified by time code
Edit Decision List
Sample Rate
Lossless Formats
Nyquist Frequency
12. 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
Cutoff Frequency
dB/FS
Floating Point
13. Very quiet digital amplifier that produces a series of output pulses with the audio signal coded the same as the width of the output pulses; Pulses are used to represent wave forms and are either on or off; Intense signals have long pulses with short
Oversampling
Amplitude Accuracy
Class - D Amplifier
Digital
14. 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
European Broadcasting Union
Transfer Protocol
Variable Bit Rate
Spectra
15. 1.) Taking a series of evenly- spaced measurements 2.) Signal contains no frequency components higher than half the sample rate
DVD-18
Requirements for A/D Conversion
Class - D Amplifier
Oversampling
16. French mathematician that noted that any complex sound can be broken down into a series of component pure tones
PCM
Micron
Joseph Fourier
D/A Conversion
17. Allowance of noise floor below that which is required for the final product
Footroom
Glass Master
DVD-18
2 Dimensions of Sound
18. A drive that can read and write on optical media that hold up to 50 GB on two layers; 24- bit/96 kHz for 8-Channel; 24- bit/192 kHz for 6-Channel
Constant Bit Rate
Index of Reflectivity
Nanometer
Blu-Ray
19. Decibels Full Scale
Micron
Sine Wave
Voltage
dBFS
20. 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
Oversampling
Successive Approximation
Decimation Filter
Stapedes Reflex
21. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit
SCMS
X-Axis Terminology
Micron
Pulse Code Modulation
22. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics
Additive Synthesis...
Class - D Amplifier
Sinusoidal
Direct Monitoring
23. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size
Requirements for A/D Conversion
Codec
Lossy
Masking Analysis...
24. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
SACD
DVD-Audio
Acoustics
Coaxial
25. In order to play multiple channels at one time data is buffered as read to disk; Latency happens between play command & beginning of playback
Bit Depth Effect on Dynamic Range
SCMS
Playback Buffering
Constant Bit Rate
26. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating
Effective Bit Depth
Sample Rate
Fletcher- Munson Curve
Successive Approximation
27. 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
Sampling Rule
Oversampling
Sinusoidal
28. 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
Inter-Channel Redundancy
Bit Depth
Sony-Philips Digital Interface Format (S/PDIF)
Ethernet
29. Same as 'aliasing'
Entropy Coding
Gain Staging
Nanometer
Foldover
30. A digital filter's time domain output sequence when the input is a single sample is input
Direct Stream Digital
Multichannel Audio Digital Interface (MADI)
PCM
Impulse Response
31. 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
Pulse Code Modulation
Frames
Sawtooth Wave
Fletcher- Munson Curve
32. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Sample- and-Hold
Internal Resolution
Lossy
Constant Bit Rate
33. Toshiba developed digital audio interface utilizes fiber optics as a transmission medium.
Perceptual Coding
TOSLINK
Edit Decision List
Conversion Buffering
34. 8- in/8- out on one cable; 25- pin D- sub connector
Sample Rate
Gain Staging
Anti-Imaging Filter
Tascam Digital Interface Format (TDIF)
35. Mixing data and control characters in a single operation
Sample Rate
Interleaved
Pulse Code Modulation
Bit Rate
36. Built into DAWs; Bits are added when signals are mixed together to avoid clipping
Headroom Bits
Sony-Philips Digital Interface Format (S/PDIF)
DVD-Audio
Footroom
37. Visual graph that shows how loud a sound is at different frequencies
Lossless Formats
Buffering
Acoustics
Sonogram
38. AAC (Advanced Audio Coding); MP3; RA; WMA; OGG Vorbis; Dolby Digital/AC-3; DTS; ADPCM
Pulse Density Modulation
Gain Staging
Lossy Formats
6 dB
39. The number of compressions or rarefactions in one second; The higher the frequency the more compressions & rarefactions per second; Measured in Hertz
Stapedes Reflex
AES3
Frequency
Overflow
40. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby
Sine Wave
Dolby 5.1
Zero-Latency Monitoring
Entropy Coding
41. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector
6 dB
CPU Buffering
Lightpipe
Storage Conversion Steps
42. 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
Bit Depth
Glass Master
Sample Rate
43. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)
Nyquist Frequency
Quantization
Convolution
Rarefaction
44. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values
Requirements for CD Audio
Digital
Voltage
Harmonic Content
45. 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
Class - D Amplifier
Quantization Intervals
Oversampling
Peak Level
46. 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
Cutoff Frequency
Perceptual Coding
CPU Buffering
Ethernet
47. AES
Masking Analysis...
Resolution
Impulse Response
Audio Engineering Society
48. 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
Threshold of Hearing
Perceptual Coding
Blu-Ray
49. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc
Photoreceptor
Blu-Ray
D/A Conversion
Bit Depth
50. Accuracy with which an electronic system reproduces the sound or image of its input signal
Cutoff Frequency
Fidelity
Buffering
Jitter