Watch and follow the YouTube video, the lesson contains three parts:
Key Information and content - all you need to do here is watch and listen
Learning activity - this activity involves answering different questions about sound
Consolidation - these are past exam question and are for deliberate practice to check your understanding.
The height/amplitude of the sound wave is measured...
... at regular intervals
... and converted to binary,
If the interval is smaller/if you sample more often you have more data to store...
... so the file is larger
but the sound reproduced is closer to the original
... so better quality.
The amplitude/height of a wave is measured
At set intervals
And stored as a binary number
The samples form an approximated sound wave
The file size increases
So the sound us better quality/more accurate compared to the original.