a single measurement of an analogue signal, typically sound

the number of samples captured per second

the number of bits used to store each sample, which determines how accurately the sample is represented

a single stream of audio used to reproduce sound

Representing sound with binary data

Computing

In this unit, pupils will focus on digital media such as images and sounds, and discover the binary digits that lie beneath these types of media. They will explore how images and sound can be manipulated and consider the link between quality of images and sound and the resulting file size.

Data representation: images and sound

to convert sound waves into electrical signals

What is the purpose of a microphone in digital audio?

the number of speakers used to play a sound

the number of sound samples taken per second

What does 'sample rate' refer to in digital audio?

the accuracy of the sound wave's representation

the type of file format used to store the sound

What does changing the sample resolution (bit depth) change in a digital audio file?

the type of microphone used to record the sound

The sound quality will decrease, and the file size will decrease.

The sound quality will increase, and the file size will increase.

The sound quality will increase, and the file size will decrease.

The sound quality will decrease, and the file size will increase.

If you increase the sample rate of a digital audio recording, what is the effect on the sound quality and file size?

to create a richer and more immersive listening experience

Why might a musician choose to record their music in stereo instead of mono?

the size of the image file on your computer

the physical dimensions of the image, increasing the height and width

the number of pixels that make up the image

When you change the resolution of an image in image editing software, what are you actually changing?

the resolution increases, so it becomes more detailed

the image stays the same size, but the file size increases

When you change the physical dimensions of an image in an image editor by increasing its height and width, what happens to the image?

What is the purpose of zooming in on an image in an image editor?

to save the image in a specific file format

What does it mean to 'export' an image in an image editor?

to create physical paintings from digital images

What is a common use of artificial intelligence (AI) in image editing?

 AI art can be too creative and original.

AI art is always low quality and not visually appealing.

AI art can be difficult to distinguish from human-created art.

AI art cannot be used for commercial purposes.

Which of the following is a potential concern about AI to create art?

This lesson will be removed by end of Summer Term 2025.

Representing sound with binary data

Lesson outcome

This lesson will be removed by end of Summer Term 2025.