Oversampling
Processing at a higher rate to reduce aliasing
Related
Oversampling temporarily raises the sample rate for processing, then converts back. It is mainly used in non-linear processing such as distortion, saturation and limiting, to reduce aliasing folding back into the audible band.
It differs from recording at a high sample rate: oversampling is a temporary internal upsample, not a change to the project rate. The usual mistake is to expect it to "improve" the sound — its goal is fewer processing artifacts; in clean processing the audible difference can be small.
Read deeper → sample rate
Sources
- 过采样在非线性处理中的作用，参通行录音教材；本文为原创表述
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