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[New Feature] Add web folder to support web documentation

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Rudy Haryanto
2022-10-04 20:17:17 +07:00
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---
id: fundamental-frequency
title: Fundamental Frequency
---
The fundamental frequency (f<sub>0</sub>) is the lowest frequency of a periodic waveform, measured in Hertz (Hz). It is the greatest common divisor of all the frequency components contained in a signal.[^1]
[^1]: https://en.wikipedia.org/wiki/Fundamental_frequency
## Raw Variables
| Variable | Description |
| ----------- | ----------- |
| `aco_ff` | **Fundamental frequency.** Frame-wise fundamental frequency values in Hz. |
## Derived Variables
| Variable | Description |
| ----------- | ----------- |
| `aco_ff_mean` | **Fundamental frequency mean.** Mean of aco_ff across the audio file. |
| `aco_ff_std` | **Fundamental frequency standard deviation.** Standard deviation of aco_ff across the audio file. |