Oversampling

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inoshi
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Oversampling

Post by inoshi » Sat Feb 01, 2020 12:41 pm

When? Why? How?
New plugin has this option. More sampling = better?

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Yes Powder
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Re: Oversampling

Post by Yes Powder » Sat Feb 01, 2020 12:52 pm

1. When your computer can handle it
2. Because calculating the output at a higher sampling rate allows for a more accurate output, presumably free of aliasing and other artifacts that could potentially be introduced by lower sMpling rates.
3. By calculating the sound output at a higher sampling rate than your soundcard is natively capable of handling and then downsampling from that, rather than calculating at the output sampling rate. Because math.
4. Yes.

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oberdada
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Re: Oversampling

Post by oberdada » Sat Feb 01, 2020 3:47 pm

Oversampling is only needed with processing or synthesis techniques that may cause aliasing, such as ring modulation, distortion or FM synthesis with the modulation index sufficiently turned up. It's sort of a lazy solution to the problem of avoiding frequencies above nyquist in the first place. The audio signal is upsampled, then processed with the nasty thing that causes aliasing, then lowpass filtered in the hope that the aliased frequencies will be in the high end of the oversampled spectrum, then the signal is downsampled back to its original sample rate.

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