Digital sound is made up of samples.
Define the term 'bit depth'.
Mark scheme
Award one mark for:
- The number of bits used per sample (1)
Allow bits per sample
Allow the number of bits used to record/store each sample
Do not accept the number of samples taken per second (sample rate)
Do not accept the number of bits used to store the whole sound file
Do not accept the number of levels/amplitude values a sample can take
Example answers and how they were marked
Full marks1/1
The number of bits used to record each sample.
Why: States the number of bits per sample (1).
No marks0/1
The number of samples taken each second.
Why: Defines sample rate, not bit depth; do not accept.
No marks0/1
The number of amplitude values each sample can take.
Why: Gives the number of levels/amplitude values, not the number of bits per sample; do not accept.