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Oversampling. Upsampling Audio [How to Convert Sample Rate Explained]
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Audio Basis - educational articles
Oversampling (upsampling) is sample rate multiplication. Read how to work oversampling.
Usually multiplexing of sample rate released as inserting ZERO SAMPLES (virtual samples) between "real" source samples.
After oversampling spectrum mirrored to upper half of old sample rate fd. So we get mirrored copy of source audio spectrum (upper part of picture).
It is non-linear distorttions in output (oversampled) audio signal.
For getting non-distorted (almost non-distorted, of course) oversampled audio signal, after oversampling need apply low frequency filtration with band from 0 to fd/2.
So we get almost clean oversampled source audio signal (music).
About downsampling read here...
Read about sample rate issues
- Audio Sample Rate Converter >
- Downsampling >
- DSF oversampling. D64 vs. D128 >
- What Better Multiple or Non-Multiple Resampling >
- Multiple vs. Non-Multiple Resampling Audio [2017] >
- Would need sample rates 352 and 384 kHz >
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