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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
Gain Staging
Sinusoidal
0 dB FS
dBFS
2. Industry Standards: -6 dB Peak = -20 RMS Meter
Acoustics
dB/FS
Recording Levels
Threshold of Pain
3. Low Pressure; Part in a longitudinal wave where the particles are spread apart
Lightpipe
Equal Loudness Contour
Rarefaction
Codec
4. Anytime bit depth is reduced the gap gets bigger so more dithering is required
Buffering Locations
Redither
Multichannel Audio Digital Interface (MADI)
DVD-9
5. Unit of measurement that is equal to one billionth of a meter
Nanometer
A/D Conversion
Morse Code
Sampling Theorem
6. 7.95 GB; SS/DL
DVD-9
European Broadcasting Union
Decimation Filter
Acoustics
7. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital
Sampling Theorem
Decoder
Quantization Error
Bit Depth Effect on Dynamic Range
8. Multi-Bit Words; (Pulse Code Modulation)
PCM
Interleaved
Transfer Protocol
Constant Bit Rate
9. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables
Square Wave
Interpolation Filter
Floating Point
EtherSound
10. The frequency above or below which attenuation begins in a filter circuit
Cutoff Frequency
SCMS
Quantization Intervals
Sampling (Samples)
11. Allowance of noise floor below that which is required for the final product
Sampling Rule
Footroom
Threshold of Pain
Word Clock
12. Snippets of time in which frequency analysis takes place in a perceptual codec
Subbands
Tascam Digital Interface Format (TDIF)
Blu-Ray
Frames
13. Reduces the percieved distortion due to quantization error; Low level white noise source is introduced to make the profile of the quantization 'noise' more irregular; Useful when reducing the number of bits per word in a signal (i.e. when converting
Quantizer
Aliasing
Requirements for CD Audio
Dithering
14. 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
Lossy Formats
Successive Approximation
Adaptive Pulse Code Modulation
Delta-Sigma Modulation
15. Accuracy with which an electronic system reproduces the sound or image of its input signal
Frames
Fidelity
Foldover
Decoder
16. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals
Sonogram
Quantization Intervals
M-S Stereo
Interpolation Filter
17. Built into DAWs; Bits are added when signals are mixed together to avoid clipping
dB/SPL
Headroom Bits
I/O Connection Buffering
Sawtooth Wave
18. Circuit that seizes voltage values with each tick of an A/D device's internal clock
Interpolation Filter
Sample- and-Hold
Redither
Cutoff Frequency
19. Branch of psychology concerned with the subjective perception of sound
Buffering
Psychoacoustics
DVD-Audio
Frequency
20. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently
Algorithm
Requirements for A/D Conversion
Sine Wave
Variable Bit Rate
21. 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
Index of Reflectivity
Codec
Subbands
Buffering
22. The number of compressions or rarefactions in one second; The higher the frequency the more compressions & rarefactions per second; Measured in Hertz
DVD-14
Joint Stereo
Frequency
Bit Depth
23. A method of representing real numbers using a mantissa and an exponent
Dynamic Range
Floating Point
Joint Stereo
AoE Formats
24. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude
Threshold of Hearing
Successive Approximation
Acoustics
Sample Rate
25. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!
Speed of Sound
Fidelity
AES3
Lossless
26. 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
Coaxial
Sample- and-Hold
Sonogram
27. A digital filter's time domain output sequence when the input is a single sample is input
Impulse Response
Blu-Ray
Lossy Formats
Quantization
28. 'Reconstructing' part of digital audio
Requirements for A/D Conversion
D/A Conversion
dB/FS
Perceptual Coding
29. Algorithm uses matrix of a mid/side microphone pair to determine a side signal & that signal is reduced then distributed as code in stereo
M-S Stereo
Anti-Imaging Filter
Joint Stereo
Jitter
30. 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
Additive Synthesis...
Pad Head & Tail
Sampling Theorem
Direct Stream Digital
31. Level above which audible sounds are painful (125 - 130 db)
Threshold of Pain
Psychoacoustics
Sample Rate Effect on Anti-Aliasing
Sampling (Samples)
32. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution
Bit Rate
Headroom Bits
Intensity Stereo
Interleaved
33. How Loud (Y-Axis) & How Fast (X-Axis)
Interleaved
DVD-5
2 Dimensions of Sound
Audio Engineering Society
34. EDL; Final list of samples used in the audio editing process; Identified by time code
DVD-14
Edit Decision List
Photoreceptor
Codec
35. Very selective method of lowering buffer levels by halting different levels of audio processing
European Broadcasting Union
Low-Latency Monitoring
PCM
Additive Synthesis...
36. Serial Copy Management System; main difference between AES3 & S/PIDF
M-S Stereo
dB/SPL
Interpolation Filter
SCMS
37. More accuracy in low amplitudes and less in higher amplitudes
Frames
Attenuation
Amplitude Accuracy
Buffering Locations
38. A sample- by- sample operation on two signals
0 dB FS
Bit Depth Effect on Dynamic Range
Convolution
Subbands
39. 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
Zero-Latency Monitoring
Storage Conversion Steps
Headroom Bits
Quantization
40. Sum of all harmonics; Sum of sine and cosine waves which have frequencies f - 2f - 3f - 4f...
Buffering Locations
Effective Bit Depth
Fourier Series
Motion Pictures Experts Group
41. Waveform of a pure tone showing simple harmonic motion
Sine Wave
Intensity
Redither
DVD-9
42. Roughly around 1 -130 ft/s
Joseph Fourier
Glass Master
Speed of Sound
Internal Resolution
43. Electromagnetic receptor that detects the radiation known as visible light
Photoreceptor
A/D Conversion
2 Dimensions of Sound
Quantization Intervals
44. Difference in brightness between land and pit on a CD Physical Format
DVD-Audio
Sample Rate
Index of Reflectivity
Nyquist Frequency
45. 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
Dolby 7.1
Cutoff Frequency
Gain Staging
Spectrum Multiplication
46. The difference in volume between the loudest and quietest sounds of a source
Sample- and-Hold
dBFS
Dynamic Range
Perceptual Coding
47. Each bit in the bit depth is equal to a _____ increase in dynamic range
6 dB
AoE Formats
Class - D Amplifier
A/D Conversion
48. Take up half as many bits (50%); Algorithm can keep same quality by lossing the stereo track
Impulse Response
Bit Rate
MONO
SACD
49. Perceptual coding technique that uses louder sounds of a similar frequency to decide what information is to be saved during data reduction
Masking Analysis...
Oscillation
Entropy Coding
Interleaved
50. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage
Headroom Bits
Quantizer
dB/FS
Red Book