Editing sound | Computing | Quizalize & Oak National Academy

Starter quiz

What is the smallest unit of data in a computer system?
- 'bit' ✓
What does resolution affect in an image?
- 'quality' ✓
Match the term with its definition:
- pixel
  
  ⇔
  
  a single element of an image ✓
- sample rate
  
  ⇔
  
  number of sound samples per second ✓
- resolution
  
  ⇔
  
  image clarity in pixels ✓
- colour depth
  
  ⇔
  
  number of bits for colour representation ✓
What does the term 'intensity' refer to in digital images?
- the file size of the image
- the resolution of the image
- the format of the image
- the strength of a colour ✓
What effect does increasing sample resolution have on a sound file?
- decreases file size
- increases file size and quality ✓
- changes the colour of the sound
- alters the file format
Arrange the following in order of increasing file size.
- low resolution, low colour depth
- high resolution, low colour depth
- high resolution, high colour depth

What is a waveform?
- a visual representation of a sound file ✓
- a type of sound file format
- a measure of sound intensity
- a method of sound compression
What does 'mono' mean in audio terms?
- sound in only one speaker
- sound in both speakers but identical ✓
- sound in alternating speakers
- sound in separate channels
Name the software used to edit and manipulate sound.
- 'Audacity' ✓
Arrange the following steps for editing a sound file.
- 1
  
  ⇔
  
  Open the sound editing software.
- 2
  
  ⇔
  
  Import the sound file.
- 3
  
  ⇔
  
  Edit the sound file.
- 4
  
  ⇔
  
  Export the edited file.
What is the impact of higher sample rate on sound quality?
- decreases quality
- increases quality ✓
- no change in quality
- changes sound format
Which of the following statements is true about MP3 and WAV files?
- MP3 files are larger in size than WAV files.
- WAV files are typically larger than MP3 because they are higher quality. ✓
- MP3 files are typically higher quality compared to WAV files.
- WAV files lose quality when exporting.

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Audacity project files can be listened to on all digital devices.

To listen to the audio on other devices, the file must be exported to a common format such as WAV (.wav) or MP3 (.mp3).

Waveform - a visual representation of a sound file, showing how the amplitude of sound varies over time
Channel - an individual stream of audio in a sound file
Mono - produces the same sound in both left and right speakers/headphones
Stereo - presents sound separately for the left and right speakers/headphones