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Take a 18 question quiz to test and certify your knowledge of the tutorial-video course
AudioPedia 103 - Digital Audio Terms and Standards.
Get a mark of 80% or higher to pass this quiz!
1
Digital audio represents the audio signal...
in 3D
with a string of binary numbers
with pictograms
with a smooth continuous voltage
2
In an Analog-to-Digital Converter, Sampling...
quantizes an analog wave
generates a string of binary numbers
genererates MIDI data
registers the changing amplitude of an analog wave at discrete points in time
3
The two most common Linear PCM audiofile formats are:
MP3 & MP4
WAV & AIF
Lossless and MP3
WAV & AAC
4
A DAC...
converts PCM audio to AAC
converts MIDI to audio
converts analog signals to digital
converts digital signals to analog
5
Perceptual coding (used in lossy audio codecs) makes use of...
the psychoacoustic phenomenon of pitch-detection
the Nyquist theory
the psychoacoustic phenomenon of pitch quantization
the psychoacoustic phenomenon of masking
6
Quantization distortion is...
consistent low-level distortion in a digital recording
gradual clipping of the audio wave in the ADC
harsh digital clipping of the audio wave
analog distortion associated with vacuum tube amplifiers
7
For modern DAWs, the standard bit resolution is...
48-bit
8-bit
24-bit
16-bit
8
The Nyquist Rule says that the Sample Rate...
must be at least twice the highest audio frequency
must be at least half the highest audio frequency
should always be 44.1 kHz
must be exactly equal to the highest audio frequency
9
In an ADC, Quantization...
corrects the timing of the incoming MIDI notes
generates a string of binary numbers
corrects the timing of the incoming analog wave
filters the analog wave before sampling
10
The two standard Sample Rates are...
50 kHz & 100 kHz
22.05 kHz & 24 kHz
44.1 kHz & 48 kHz
88.2 kHz and 96 kHz
11
A common standrad for "hi-res' digital audio is...
16/48
24/96
16/192
16/44.1
12
Common bitrates for lossy audiofiles range from...
1-10 Mbps
128–256 Mbps
1,411-2.116 Mbps
16-24 Mbps
13
An ADC...
converts analog signals to digital
converts PCM audio to MP3
converts digital signals to analog
is an Australian hard rock band
14
Dither is...
digital distortion from poor analog-to-digital conversion
bad
varying sample rates in multitrack audio ADCs
random noise added to a digital recording
15
In a traditional ADC, an Anti-Aliasing filter...
is a 4-pole lowpass filter
a 2-pole lowpass filter
is a brickwall highpass filter
is a brickwall lowpass filter
16
A codec is...
a processor used in the creation of LPCM audiofiles
a MIDI controller
a digital database for different styles of music
an encode-decode formula for reducing audio file size
17
The current standard method of oversampling is casually referred to as...
AC/DC sampling
ADC sampling
1-bit sampling
lossy sampling
18
Current lossy codecs for audio files include...
MP3, MP4, AAC
PCM, LPCM
AIFF, WAV
ALAC, FLAC
AudioPedia 103
Digital Audio Terms and Standards
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