objectives 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 ID: 631702
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Slide1
Independent Task – A
Learningobjectives
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
SoundAnalogueDigitising
SamplingPitchBinarySlide2
Independent Task – A
Learningobjectives
Open Audacity – You will need headphones!
Start > Programs > Multimedia > AudacityChoose an MP3 file from L Drive > ICT > Resources > MusicOpen the file from inside Audacity or drag and drop it into the software
AmplitudeFrequency
MegahertzSoundAnalogueDigitising
SamplingPitchBinarySlide3
Independent Task – A
Learningobjectives
Click on the Edit Menu >
PreferencesIn 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
FrequencyMegahertzSoundAnalogueDigitising
SamplingPitchBinarySlide4
Independent Task – A
Learningobjectives
Amplitude
FrequencyMegahertz
SoundAnalogueDigitising
SamplingPitchBinarySlide5
Independent Task – A
Learningobjectives
Amplitude
FrequencyMegahertz
SoundAnalogueDigitising
SamplingPitchBinary
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?Slide6
Independent Task – A
Learningobjectives
Amplitude
FrequencyMegahertz
SoundAnalogue
DigitisingSamplingPitchBinary
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?