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Flashcards in Audio Tech paper 1 Deck (30)
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1
Q

A high-shelving filter is equivalent to which control typically found on hi-fi equipment?

A

Treble

2
Q

In terms of audio filters, a higher “Q” factor leads to what?

A

Higher frequencies are attenuated

3
Q

In what circumstances might a sound be perceived at a lower level, when it is panned to the centre rather than panned left or right?

A

When linear panning is used

4
Q

What is the formula for working out the bit rate?

A

frequency x bit depth x channels = bit rate

5
Q

How do you work out the size (in mb) of an audio file?

A

frequency x bit depth x channels x seconds / 8 x 1024 squared.

6
Q

Give an example of a ‘lossless’ audio file format

A

WAV

7
Q

What is the ‘Nyquist’ frequency?

A

Equal to half the sampling rate of the system

8
Q

What is the standard sample rate for an audio cd?

A

44.1kHz

9
Q

What happens when a signal exceeds the maximum amplitude supported by a digital system?

A

Clipping

10
Q

What is the transmission rate of MIDI data along a standard MIDI cable?

A

31250bps

11
Q

Which early electronic instrument transmitted its sound along telephone lines?

A

Telharmonium

12
Q

Who was one of the founders of ‘musique concrète’?

A

Pierre Schaeffer

13
Q

Give 3 examples of audio file formats.

A

FLAC, AAC, OPUS

14
Q

Give 3 examples of encoding audio samples in a digital audio file.

A

PCM, ADC, ADPCM

15
Q

What is the primary purpose of the biquad~ object in max?

A

To filter a sound.

16
Q

Give 3 examples of Max objects that use delay.

A

svf~
delay~
comb~

17
Q

The unit “cycles per second” or CPS is equivalent to what?

A

Hz

18
Q

The human ear canal accentuates approximately which frequency range?

A

2-5kHz

19
Q

What frequency ratio is equivalent to the musical interval of 25 cents?

A

1.0145

20
Q

An increase in amplitude by a factor of 2 is equivalent to what?

A

6dB change

21
Q

0 db SPL is known as what?

A

Threshold of hearing

22
Q

Sound travels through air at approximately which speed?

A

340m/s

23
Q

With reference to the relative phase of waveforms, which of the following is equivalent to 180 degrees.

A

π

24
Q

What is a complex tone containing frequencies in non-integer relationships known as?

A

Inharmonic

25
Q

What plot would you use to analyse the frequency of a sound that varies over time?

A

Sonogram

26
Q

Vibrato in musical performance is equivalent to which kind of modulation?

A

Frequency modulation

27
Q

Give 3 uses for multi-sampling in sample-based synthesis.

A
  • Making multi-channel recordings of instruments
  • Capturing variations of timbre across pitch and velocity
  • Representing different playing styles
28
Q

Give an example of resynthesis.

A

Vocoding

29
Q

Give 3 examples of uses to communicate note data between musical devices.

A

MIDI
CV
OSC

30
Q

In sound synthesis, what term describes the evolution of a particular sound parameter over the duration of sound or musical note?

A

Envelope