1. Independent Task – Level 7
Learning
objectives
Independent Task – Level 7
This is what your computer actually saves when you save a sound file – in this case it is a midi file but it would look similar if it was an MP3 file
Amplitude
Frequency
Megahertz
Sound Analogue Digitising
Sampling
Pitch
Binary

2. Independent Task – Level 7
Learning
objectives
Independent Task – Level 7
Open Audacity – You will need headphones!
Start > Programs > Multimedia > Audacity
Choose an MP3 file from L Drive > ICT > Resources > Music
Open the file from inside Audacity or drag and drop it into the software
Amplitude
Frequency
Megahertz
Sound Analogue Digitising
Sampling
Pitch
Binary

3. Independent Task – Level 7
Learning
objectives
Independent Task – Level 7
Click on the Edit Menu > Preferences
In the window that opens scroll to the "Quality" section
In the right pane next to "Default Sample Rate" choose a value: (screenshot on next slide)
Amplitude
Frequency
Megahertz
Sound Analogue Digitising
Sampling
Pitch
Binary

4. Independent Task – Level 7
Learning
objectives
Independent Task – Level 7
Amplitude
Frequency
Megahertz
Sound Analogue Digitising
Sampling
Pitch
Binary

5. Independent Task – Level 7
Learning
objectives
Independent Task – Level 7
Experiment with different sampling rates – listen to the file – has the quality changed? Is it better or worse?
Export the file and look at how the file size changes for different sampling rates.
How is this effected?
Amplitude
Frequency
Megahertz
Sound Analogue Digitising
Sampling
Pitch
Binary

6. Independent Task – Level 7
Learning
objectives
Independent Task – Level 7
In your book:
Discuss how sampling rate effects the quality of the sound file and its size. What conclusions do you come to – what considerations would someone needing to use a sound file need to think about?
Amplitude
Frequency
Megahertz
Sound Analogue Digitising
Sampling
Pitch
Binary