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

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

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

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

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

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