# Filter

### Overview

Rift’s filter is useful for adding color, movement, and stereo effects or simply warming up a distorted signal.

<div align="left"><figure><img src="/files/u5rWGunSHghH411sEzS2" alt="" width="371"><figcaption></figcaption></figure></div>

1. **Filter Bypass.** Turn the Filter module on or off. This is useful for A-B’ing the effect or reducing Rift’s CPU load when the module is not needed.

<div align="left"><figure><img src="/files/0BwgbuY3cGxRYumAI9HK" alt="" width="154"><figcaption></figcaption></figure></div>

2. **Filter Routing.** Choose if the filter comes before or after both the distortion and feedback.

<div align="left"><figure><img src="/files/ZdexmfjXvWfTaZvqUBQM" alt="" width="35"><figcaption></figcaption></figure></div>

Pre: Filter ⟶ Distortion ⟶ Feedbackpre is ideal for more distorted effects.

<div align="left"><figure><img src="/files/tbCSBTM0AuWYNCRULrtQ" alt="" width="35"><figcaption></figcaption></figure></div>

Post: Distortion ⟶ Feedback ⟶ Filterpost is great for filtering rich harmonics from the distortion and feedback.

<div align="left"><figure><img src="/files/tc8Z0uTpJqPJiYIKgbfD" alt="" width="35"><figcaption></figcaption></figure></div>

3. **Filter Type.** Select filter type:

<div align="left"><figure><img src="/files/H1logc8hIICEVhsvdgCg" alt="" width="203"><figcaption></figcaption></figure></div>

* Basic: Standard 24dB filters.
* Morph: Filters that smoothly morph between different types.
* Peaking: Filters that use peaks and notches to create formant and phaser-like effects.
* Harmonic: Filters based on the harmonic series, ideal for accenting or reducing specific harmonics in a sound. Especially effective when the filter is set to Pre.

<div align="left"><figure><img src="/files/PoEEvzxj4Sfi6uMtWK6A" alt="" width="92"><figcaption></figcaption></figure></div>

4. **Cutoff.** Controls the Filter frequency in Hz or Tuned notes

**Cutoff Range**

<div align="left"><figure><img src="/files/srABHmdDqOfqTUo9H4GS" alt="" width="88"><figcaption></figcaption></figure></div>

Select how the filter **Cutoff** is mapped:

* MIDI. The filter’s cutoff tracks MIDI notes sent to Rift, and Cutoff transposes these notes by semitones.
* HZ. Cutoff is set to standard Hz values.
* Tune. Cutoff is set to specific note values.

5. **Resonance.** Set the amount of Filter Resonance.

<div align="left"><figure><img src="/files/zIDGLSifVDbLHn0UzZEN" alt="" width="98"><figcaption></figcaption></figure></div>

6. **Morph.** Morph between the internal Filter settings. This can create different effects depending on which Filter is selected.

<div align="left"><figure><img src="/files/19EmxgcdSKzvKsd3LdfM" alt="" width="93"><figcaption></figcaption></figure></div>

7. **Filter Spread.** Adjust the relative Cutoff of the left and right channels to create wide stereo effects. Positive values gradually make the right filter higher, and the left filter lower. The inverse is true for negative values.

<div align="left"><figure><img src="/files/hh8pMfkRExR28yNjDwvq" alt="" width="92"><figcaption></figcaption></figure></div>

8. **Filter Mix.** Control the mix between the signal entering the Filter and the wet filtered mix.

<div align="left"><figure><img src="/files/W9QHF0Et81PnP687WT5M" alt="" width="219"><figcaption></figcaption></figure></div>

9. **Filter Amp Mod.** Add audio rate amplitude modulation that follows the filter’s Cutoff frequency.

<div align="left"><figure><img src="/files/tsUf0CcaBCTmyO98LLQp" alt="" width="63"><figcaption></figcaption></figure></div>

This is useful for creating extra harmonics and tonal content that can sound similar to frequency modulation.

{% hint style="info" %}
Try combing Amp Mod with Tune and MIDI modes to create melodic harmonics with the Cutoff
{% endhint %}

**Pitch Snap.** is a useful tool for quantizing the Cutoff to specific notes and scales. When combined with modulating Cutoff, you can create melodies with Rift!

1. **Cutoff Pitch Snap.** Create musical scales by selecting which notes Cutoff will snap to. With all twelve pitch buttons off, any modulation sent to Cutoff will move freely between notes. This only affects Cutoff in MIDI and Tune modes.

**Toggle Note ON.** Cutoff will snap to the notes that are toggled ON.

<div align="left"><figure><img src="/files/fEeTqBu3jTixNK7J4hZg" alt="" width="58"><figcaption></figcaption></figure></div>

**Toggle Note OFF.** Cutoff will NOT snap to the notes that are toggled OFF.

<div align="left"><figure><img src="/files/baq1UD3sJIi5JvHewgxX" alt="" width="59"><figcaption></figcaption></figure></div>

2. **Select Preset Scale.** Choose from a variety of useful scales for the Pitch Snap

<div align="left"><figure><img src="/files/DBECoXA7RrAADMXrjMsu" alt="" width="84"><figcaption></figcaption></figure></div>

3. **Lock Scale.** When enabled, this will preserve the current selection of notes while changing presets.

<div align="left"><figure><img src="/files/sq509KyolqCy6YIa9BzK" alt="" width="102"><figcaption></figcaption></figure></div>

4. **Pitch Snap Link.** Link which notes are selected for both Frequency and Cutoff. This will only have an effect in MIDI and Tune modes.

<div align="left"><figure><img src="/files/cI968LAvwLB0XAZzKVhu" alt="" width="102"><figcaption></figcaption></figure></div>


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