# Wavetables

Control wavetable synthesis parameters for scanning through waveforms.

## Scan Position

The `scan` parameter controls which waveform in the wavetable is active:

```forth
"wt" s 0.0 scan .   ( first waveform )
"wt" s 0.5 scan .   ( middle of table )
"wt" s 1.0 scan .   ( last waveform )
```

## Wavetable Length

Set the cycle length in samples:

```forth
"wt" s 2048 wtlen .  ( standard wavetable size )
```

## Scan Modulation

Animate the scan position with an LFO:

```forth
"wt" s 0.2 scanlfo .    ( LFO rate in Hz )
"wt" s 0.4 scandepth .  ( LFO depth 0-1 )
"wt" s "tri" scanshape . ( LFO shape )
```

Available shapes: `sine`, `tri`, `saw`, `square`, `sh` (sample & hold)

## Example

```forth
"wavetable" s
  60 note
  0.25 scan
  0.1 scanlfo
  0.3 scandepth
  "sine" scanshape
.
```

## Words

| Word | Stack | Description |
|------|-------|-------------|
| `scan` | (f --) | Set wavetable scan position (0-1) |
| `wtlen` | (n --) | Set wavetable cycle length in samples |
| `scanlfo` | (f --) | Set scan LFO rate (Hz) |
| `scandepth` | (f --) | Set scan LFO depth (0-1) |
| `scanshape` | (s --) | Set scan LFO shape |