Multiple choiceQuestion 1 · Apply
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By the end you can explain the impact of changing the sampling rate and the sampling resolution on the accuracy of a sound recording and on its file size.
A phone call sounds a bit tinny. A studio master sounds like the band is in your room. Both are digital sound.
The difference comes down to two numbers: how often you sample, and how many bits each sample gets. If that sounds familiar, it should:
| Bitmap | Sound |
|---|---|
| image resolution: how many pixels | sampling rate: how many samples per second |
| colour depth: bits per pixel | sampling resolution: bits per sample |
Turn either sound dial up: a more accurate recording and a bigger file.
Increase the sampling rate → samples are closer together in time → rapid changes in the wave (high-pitched sounds) are captured → the recording is a more accurate copy of the original. But there are more samples per second to store, so the file is larger.
Decrease the sampling rate → bigger gaps between samples → fast changes fall between samples and are lost → less accurate (high frequencies missing, sound muffled), but a smaller file.