# Modulation Effects

Phaser, flanger, and chorus effects for movement and width.

## Phaser

```forth
"pad" s
  1 phaser           ( rate in Hz )
  0.5 phaserdepth    ( depth )
  0.5 phasersweep    ( sweep range )
  1000 phasercenter  ( center frequency )
.
```

## Flanger

```forth
"guitar" s
  0.5 flanger           ( rate )
  0.5 flangerdepth      ( depth )
  0.5 flangerfeedback   ( feedback for metallic sound )
.
```

## Chorus

```forth
"keys" s
  1 chorus        ( rate )
  0.5 chorusdepth ( depth )
  0.02 chorusdelay ( base delay time )
.
```

## Combining Effects

```forth
"pad" s
  c4 note
  0.3 phaserdepth
  0.5 phaser
  0.2 chorus
  0.3 chorusdepth
.
```

## Words

| Word | Stack | Description |
|------|-------|-------------|
| `phaser` | (f --) | Set phaser rate |
| `phaserdepth` | (f --) | Set phaser depth |
| `phasersweep` | (f --) | Set phaser sweep |
| `phasercenter` | (f --) | Set phaser center frequency |
| `flanger` | (f --) | Set flanger rate |
| `flangerdepth` | (f --) | Set flanger depth |
| `flangerfeedback` | (f --) | Set flanger feedback |
| `chorus` | (f --) | Set chorus rate |
| `chorusdepth` | (f --) | Set chorus depth |
| `chorusdelay` | (f --) | Set chorus delay |