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