> For the complete documentation index, see [llms.txt](https://docs.lmms.io/user-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lmms.io/user-manual/jian-ti-zhong-wen/xiao-guo-qi-cha-jian/equalizer-jun-heng-qi.md). # Equalizer（均衡器）

## Filters You'll notice that there are 8 columns with numbers 1-8, these represent 8 different filters (of 5 filter *types*) that can be used to alter the input signal. ### Filter Settings *

**:** toggles their respective filters on/off. (Notice the symbols next to the numbers) *

**:** adjusts slope of **Highpass (1)** and **Lowpass (8)** Filters, respective to each filter. *

**:** adjusts gain of **Filters 2 through 7**, respective to each Filter. * **Row of Knobs:** * **Top Row:** adjusts the Cutoff Frequency of their respective filter * **Bottom Row:** adjusts the Resonance (**Filters 1**, **2**, **7**, and **8**) and Bandwidth (**Filters 3**, **4**, **5**, and **6**) of their respective filters. ### Filter Types * **1:** This is a **Highpass Filter**, it *removes* frequencies *below* the cutoff frequency. * **2:** This is **Low Shelf Filter**, it can either *boost or reduce* frequencies *below* the cutoff frequency. * **3 through 6:** These are **Peak Filters**, they can either *boost or reduce* frequencies **around** the cutoff frequency. * **7:** This is a **High Shelf Filter**, it can either *boost or reduce* frequencies *above* the cutoff frequency. * **8:** This is a **Lowpass Filter**, it *removes* frequencies *above* the cutoff frequency. ## Other * **In (Slider):** adjusts the gain of the input signal. * **Out (Slider):** adjusts the gain of the output signal.