> For the complete documentation index, see [llms.txt](https://manual.minimal.audio/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manual.minimal.audio/rift-manual/modulation/morphing-lfo.md).

# Morphing LFO

### Overview

The **LFO** is a flexible, multi-purpose modulation source that can change shape in multiple ways and inject random movement into your presets.

Morph between four classic waveforms. Each shape can be randomized to create smooth random motion, sample-and-hold steps, and more. MIDI trigger modes and fade controls let it function as a one-shot attack-decay envelope or as a freely looping random source.

<div align="left"><figure><img src="/files/ktHXrFhWBxLlDYTy2qqk" alt="" width="563"><figcaption></figcaption></figure></div>

### 1. Main Controls

**Rate.** Adjust the LFO rate in BPM-synced values.

**LFO Shape.** Choose sine, triangle, downward ramp, or square. With **Snap** off, shapes can be morphed continuously.

**Shape Snap.** Enable snapping between LFO shapes. When off, the LFO shape morphs smoothly.

### 2. MIDI Retrigger

Choose how the LFO responds to incoming MIDI signals:

* **Off.** Standard Looping LFO with no retriggering.
* **Purple.** Incoming MIDI notes retrigger the looping LFO.
* **Orange.** Incoming MIDI notes retrigger the LFO as a one-shot envelope.

### 3. LFO Display&#x20;

Shows the real-time LFO position and shape based on the current settings.

### 4. Randomize

Adjust how much randomness is applied to the LFO. Each waveform is randomized in its own unique way.


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