# FX Automation Applied

## Resumen de Automatizacion de FX Implementada

**Sprint:** Granular v0.1.40  
**Tareas:** T072-T077  
**Modulo:** Integrado en `server.py`

---

## Resumen Ejecutivo

Se implemento automatizacion de FX para transiciones dinamicas en secciones de tracks reggaeton, incluyendo filter sweeps, reverb tails, pitch risers y micro-timing.

---

## FX Implementados

### T072: Filter Sweep Automation

```python
def apply_filter_sweep(
    track_index: int,
    section_start_bar: int,
    section_end_bar: int,
    sweep_type: str = "highpass_up"
) -> str:
```

**Tipos de sweep:**
- `highpass_up`: Sube filtro de graves antes del drop
- `lowpass_down`: Baja filtro de agudos para breaks

**Uso tipico:**
- 8 bars antes del drop: low-cut sube de 80Hz a 1.2kHz
- Snap al drop: filtro regresa a 80Hz instantaneamente

---

### T073: Reverb Tail Automation

```python
def apply_reverb_tail_automation(
    track_index: int,
    section_start_bar: int,
    section_end_bar: int
) -> str:
```

**Patron de reverb:**
- Reverb 0% -> 40% -> 0% para crear espacio en breaks
- Automatizacion de reverb send steerable

**Uso tipico:**
- Breaks atmos: reverb sube al inicio, baja antes del build
- Vocals: reverb swell antes del drop

---

### T074: Pitch Riser Automation

```python
def apply_pitch_riser(
    track_index: int,
    start_bar: int,
    end_bar: int,
    start_semitones: float = 0,
    end_semitones: float = 12
) -> str:
```

**Configuracion:**
- Pitch inicial: 0 semitonos
- Pitch final: +12 semitonos (1 octava arriba)

**Uso tipico:**
- Sintetizadores de textura antes del drop
- Noise sweeps con pitch rise
- Snare rolls con pitch creciente

---

### T075: Micro-Timing Push

```python
def apply_micro_timing_push(
    track_index: int,
    kick_offset_ms: float = -5,
    bass_offset_ms: float = 8,
    apply_to_clips: bool = True
) -> str:
```

**Offsets tipicos:**
- Kick: -5ms (adelantado, "push")
- Bass: +8ms (atrasado, "siente")

**Efecto:**
- Crea groove organico tipo hardware
- Evita rigidez de cuantizacion perfecta

---

### T076: Groove Template Application

```python
def apply_groove_template(
    section: str,
    template_name: str = "tech_house_drop"
) -> str:
```

**Templates disponibles:**
- `tech_house_drop`: Groove apretado, sidechain pronunciado
- `tech_house_break`: Mas swing, espaciado
- `deep_house_drop`: Groove suelto, shuffle suave
- `techno_minimal`: Preciso, casi straight

---

### T077: Transition FX Injection

```python
def inject_transition_fx_detailed(
    fx_type: str,
    position_bar: int,
    intensity: str = "medium"
) -> str:
```

**Tipos de FX:**
- `riser`: Ascenso de tension
- `crash`: Impacto en transicion
- `snare_roll`: Rollde snare crescendo
- `noise_sweep`: Barrido de ruido blanco
- `reverse`: Reverb inverso

---

## Integracion con Estructura Reggaeton

### Intro (0-32 beats)
- Sin FX automation
- Layer basico: kick, hat, bass

### Build A (32-64 beats)
- Filter sweep: highpass up desde bar 56
- Pitch riser: +6 semitonos en ultimos 8 bars
- Reverb tail creciendo

### Drop A (64-128 beats)
- Snap de filtros al inicio
- Micro-timing: kick -5ms, bass +8ms
- Groove template: tech_house_drop

### Break (128-160 beats)
- Reverb swell: 0% -> 40% -> 0%
- Filter sweep: lowpass down
- FX: reverse reverb antes del build

### Build B (160-192 beats)
- Pitch riser: +12 semitonos
- Noise sweep
- Snare roll crescendo

### Drop B (192-256 beats)
- Snap de filtros
- Groove template aplicado
- Maximum energy

### Outro (256-288 beats)
- Filter sweep: lowpass down
- Fade de elementos

---

## Ejemplos de Uso

### Filter Sweep Pre-Drop

```python
# Aplicar filter sweep 8 bars antes del drop
result = apply_filter_sweep(
    track_index=6,  # Synth track
    section_start_bar=56,  # Bar 56 de 64
    section_end_bar=64,
    sweep_type="highpass_up"
)
```

### Reverb Tail en Break

```python
# Reverb automation en break
result = apply_reverb_tail_automation(
    track_index=8,  # Atmos track
    section_start_bar=128,
    section_end_bar=160
)
```

### Pitch Riser en Build

```python
# Pitch riser 1 octava en build B
result = apply_pitch_riser(
    track_index=6,  # Synth track
    start_bar=160,
    end_bar=192,
    start_semitones=0,
    end_semitones=12
)
```

---

## Parametros por Defecto

| FX | Parametro | Valor Default |
|----|-----------|---------------|
| Filter sweep | Frecuencia inicio | 80 Hz |
| Filter sweep | Frecuencia fin | 1.2 kHz |
| Reverb tail | Wet % inicio | 0% |
| Reverb tail | Wet % peak | 40% |
| Pitch riser | Semitonos inicio | 0 |
| Pitch riser | Semitonos fin | +12 |
| Micro-timing | Kick offset | -5 ms |
| Micro-timing | Bass offset | +8 ms |

---

## Validacion

### Checklist de FX

- [ ] Filter sweep sube antes del drop
- [ ] Reverb swell en breaks
- [ ] Pitch riser en builds
- [ ] Micro-timing en drops
- [ ] Transition FX en puntos clave

### Tests

```powershell
python -m pytest "tests/test_fx_automation.py" -v
```

---

## Limitaciones

1. **Solo MIDI tracks**: La automatizacion de audio requiere clips existentes
2. **Timing preciso**: Los FX dependen de estructura correcta
3. **Dispositivos**: Solo funciona con dispositivos que exponen parametros

---

## Roadmap

- [ ] T078: Automatizacion de compresor sidechain
- [ ] T079: Automatizacion de EQ dinamico
- [ ] T080: Morphing de presets

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*Maintained by: AbletonMCP-AI Team*  
*Last updated: 2026-04-05*