# Triangle

> Triangular (Bartlett) window for FFT spectrum analysis.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.AudioModule

```csharp
Triangle = 1
```

### Remarks

Window function: `W[n] = 1 - abs(2n/N - 1)`, where `n` is the sample index and `N` is the window length.

Pass this value to the `window` parameter of [AudioListener.GetSpectrumData](/engine/6000.7/script-reference/unityengine/audiolistener/getspectrumdata.md) or [AudioSource.GetSpectrumData](/engine/6000.7/script-reference/unityengine/audiosource/getspectrumdata.md). The window is applied before the FFT to reduce spectral leakage between frequency bins.

The triangular window linearly tapers samples toward the edges of the block. It reduces leakage compared with [FFTWindow.Rectangular](/engine/6000.7/script-reference/unityengine/fftwindow/rectangular.md) with less taper than [FFTWindow.Hanning](/engine/6000.7/script-reference/unityengine/fftwindow/hanning.md) or [FFTWindow.Hamming](/engine/6000.7/script-reference/unityengine/fftwindow/hamming.md). Use it as a middle ground when rectangular leakage is visible but a full raised-cosine window is not needed.

Additional Resources: [FFTWindow](/engine/6000.7/script-reference/unityengine/fftwindow.md), [FFTWindow.Rectangular](/engine/6000.7/script-reference/unityengine/fftwindow/rectangular.md), [FFTWindow.Hanning](/engine/6000.7/script-reference/unityengine/fftwindow/hanning.md)