---
title: Filtering
has_children: false
parent: MNE Analyze
grand_parent: Documentation
nav_order: 6
---
# Filtering

The filter plugin lets you select the parameters for filtering the data in the signal viewer. For a basic filter, just input the range of frequencies you want to let you filter pass and select `Activate filter`. The data displayed in the signal viewer will reflect your filter settings, which can be changed in real time.

![](../../images/analyze/mne_an_filter_2.png)

With MNE Analyze in Research mode, you also have the option to design their filter with the `Advanced filter design` button.

![](../../images/analyze/mne_an_filter_1.png)

Here you have more options about the types of filters and filter parameters, and are given a preview of your filter design.

![](../../images/analyze/mne_an_filter_3.png)
