> 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/dual-filter-shuanglbo-qi.md).

# Dual Filter（双滤波器）

<figure><img src="https://3710990805-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZRacsG2wvxpXwri0XH6G%2Fuploads%2FpQF2GoFxppasvULH2Trw%2Fimage.png?alt=media&amp;token=fe944276-8dea-4729-9979-3ee5ffc6e690" alt=""><figcaption><p>Dual Filter</p></figcaption></figure>

A plugin featuring 2 filters processed in parallel.

## Filter Parameters

* **FREQ:** adjusts cutoff/center frequency.
* **RESO:** adjusts resonance/bandwidth of the selected filter.
* **GAIN:** adjusts output gain of the selected filter.
* **Dropdown Menu:** allows for the selection of a filter from a list.

## Other

* **MIX:** adjusts final output bias to favor one filter over the other.

  With a value of:

  * **-1**, Filter 2 is muted and Filter 1 is the sole output.
  * **0**, Filter 2 and 1's outputs are mixed at 50/50.
  * **1**, Filter 1 is muted and Filter 2 is the sole output.