O-LevelComputer ScienceData Representation2210/12 · Oct/Nov 2023 · Q55 Marks
A band is recording their new song. They need to consider the sample rate and sample resolution of their recording.
- (a)Give one benefit of using a higher sample rate to record the song.[1]
- (b)Give one drawback of using a higher sample rate to record the song.[1]
- (c)Describe what is meant by sample resolution.[2]
- (d)The band wants to compress the sound file, but they do not want any data to be permanently removed. Identify the compression method that should be used.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.
- [1] Any one from: // The recording of the song is more accurate/closer to original
- [1] Any one from: // The file size will be increased // The file will require more storage space
- [2] Any two from: // The number of bits that are used per sample // that provides the variation in amplitude that can be stored for each sample // defines the number of different amplitudes that can be recorded // that determines how quiet/loud the sounds are that can be recorded // Example e.g. 16-bit
- [1] Lossless
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