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+---
+name: audiocraft-audio-generation
+description: PyTorch library for audio generation including text-to-music (MusicGen) and text-to-sound (AudioGen). Use when you need to generate music from text descriptions, create sound effects, or perform melody-conditioned music generation.
+version: 1.0.0
+author: Orchestra Research
+license: MIT
+dependencies: [audiocraft, torch>=2.0.0, transformers>=4.30.0]
+metadata:
+  hermes:
+    tags: [Multimodal, Audio Generation, Text-to-Music, Text-to-Audio, MusicGen]
+
+---
+
+# AudioCraft: Audio Generation
+
+Comprehensive guide to using Meta's AudioCraft for text-to-music and text-to-audio generation with MusicGen, AudioGen, and EnCodec.
+
+## When to use AudioCraft
+
+**Use AudioCraft when:**
+- Need to generate music from text descriptions
+- Creating sound effects and environmental audio
+- Building music generation applications
+- Need melody-conditioned music generation
+- Want stereo audio output
+- Require controllable music generation with style transfer
+
+**Key features:**
+- **MusicGen**: Text-to-music generation with melody conditioning
+- **AudioGen**: Text-to-sound effects generation
+- **EnCodec**: High-fidelity neural audio codec
+- **Multiple model sizes**: Small (300M) to Large (3.3B)
+- **Stereo support**: Full stereo audio generation
+- **Style conditioning**: MusicGen-Style for reference-based generation
+
+**Use alternatives instead:**
+- **Stable Audio**: For longer commercial music generation
+- **Bark**: For text-to-speech with music/sound effects
+- **Riffusion**: For spectogram-based music generation
+- **OpenAI Jukebox**: For raw audio generation with lyrics
+
+## Quick start
+
+### Installation
+
+```bash
+# From PyPI
+pip install audiocraft
+
+# From GitHub (latest)
+pip install git+https://github.com/facebookresearch/audiocraft.git
+
+# Or use HuggingFace Transformers
+pip install transformers torch torchaudio
+```
+
+### Basic text-to-music (AudioCraft)
+
+```python
+import torchaudio
+from audiocraft.models import MusicGen
+
+# Load model
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+# Set generation parameters
+model.set_generation_params(
+    duration=8,  # seconds
+    top_k=250,
+    temperature=1.0
+)
+
+# Generate from text
+descriptions = ["happy upbeat electronic dance music with synths"]
+wav = model.generate(descriptions)
+
+# Save audio
+torchaudio.save("output.wav", wav[0].cpu(), sample_rate=32000)
+```
+
+### Using HuggingFace Transformers
+
+```python
+from transformers import AutoProcessor, MusicgenForConditionalGeneration
+import scipy
+
+# Load model and processor
+processor = AutoProcessor.from_pretrained("facebook/musicgen-small")
+model = MusicgenForConditionalGeneration.from_pretrained("facebook/musicgen-small")
+model.to("cuda")
+
+# Generate music
+inputs = processor(
+    text=["80s pop track with bassy drums and synth"],
+    padding=True,
+    return_tensors="pt"
+).to("cuda")
+
+audio_values = model.generate(
+    **inputs,
+    do_sample=True,
+    guidance_scale=3,
+    max_new_tokens=256
+)
+
+# Save
+sampling_rate = model.config.audio_encoder.sampling_rate
+scipy.io.wavfile.write("output.wav", rate=sampling_rate, data=audio_values[0, 0].cpu().numpy())
+```
+
+### Text-to-sound with AudioGen
+
+```python
+from audiocraft.models import AudioGen
+
+# Load AudioGen
+model = AudioGen.get_pretrained('facebook/audiogen-medium')
+
+model.set_generation_params(duration=5)
+
+# Generate sound effects
+descriptions = ["dog barking in a park with birds chirping"]
+wav = model.generate(descriptions)
+
+torchaudio.save("sound.wav", wav[0].cpu(), sample_rate=16000)
+```
+
+## Core concepts
+
+### Architecture overview
+
+```
+AudioCraft Architecture:
+┌──────────────────────────────────────────────────────────────┐
+│                    Text Encoder (T5)                          │
+│                         │                                     │
+│                    Text Embeddings                            │
+└────────────────────────┬─────────────────────────────────────┘
+                         │
+┌────────────────────────▼─────────────────────────────────────┐
+│              Transformer Decoder (LM)                         │
+│     Auto-regressively generates audio tokens                  │
+│     Using efficient token interleaving patterns               │
+└────────────────────────┬─────────────────────────────────────┘
+                         │
+┌────────────────────────▼─────────────────────────────────────┐
+│                EnCodec Audio Decoder                          │
+│        Converts tokens back to audio waveform                 │
+└──────────────────────────────────────────────────────────────┘
+```
+
+### Model variants
+
+| Model | Size | Description | Use Case |
+|-------|------|-------------|----------|
+| `musicgen-small` | 300M | Text-to-music | Quick generation |
+| `musicgen-medium` | 1.5B | Text-to-music | Balanced |
+| `musicgen-large` | 3.3B | Text-to-music | Best quality |
+| `musicgen-melody` | 1.5B | Text + melody | Melody conditioning |
+| `musicgen-melody-large` | 3.3B | Text + melody | Best melody |
+| `musicgen-stereo-*` | Varies | Stereo output | Stereo generation |
+| `musicgen-style` | 1.5B | Style transfer | Reference-based |
+| `audiogen-medium` | 1.5B | Text-to-sound | Sound effects |
+
+### Generation parameters
+
+| Parameter | Default | Description |
+|-----------|---------|-------------|
+| `duration` | 8.0 | Length in seconds (1-120) |
+| `top_k` | 250 | Top-k sampling |
+| `top_p` | 0.0 | Nucleus sampling (0 = disabled) |
+| `temperature` | 1.0 | Sampling temperature |
+| `cfg_coef` | 3.0 | Classifier-free guidance |
+
+## MusicGen usage
+
+### Text-to-music generation
+
+```python
+from audiocraft.models import MusicGen
+import torchaudio
+
+model = MusicGen.get_pretrained('facebook/musicgen-medium')
+
+# Configure generation
+model.set_generation_params(
+    duration=30,          # Up to 30 seconds
+    top_k=250,            # Sampling diversity
+    top_p=0.0,            # 0 = use top_k only
+    temperature=1.0,      # Creativity (higher = more varied)
+    cfg_coef=3.0          # Text adherence (higher = stricter)
+)
+
+# Generate multiple samples
+descriptions = [
+    "epic orchestral soundtrack with strings and brass",
+    "chill lo-fi hip hop beat with jazzy piano",
+    "energetic rock song with electric guitar"
+]
+
+# Generate (returns [batch, channels, samples])
+wav = model.generate(descriptions)
+
+# Save each
+for i, audio in enumerate(wav):
+    torchaudio.save(f"music_{i}.wav", audio.cpu(), sample_rate=32000)
+```
+
+### Melody-conditioned generation
+
+```python
+from audiocraft.models import MusicGen
+import torchaudio
+
+# Load melody model
+model = MusicGen.get_pretrained('facebook/musicgen-melody')
+model.set_generation_params(duration=30)
+
+# Load melody audio
+melody, sr = torchaudio.load("melody.wav")
+
+# Generate with melody conditioning
+descriptions = ["acoustic guitar folk song"]
+wav = model.generate_with_chroma(descriptions, melody, sr)
+
+torchaudio.save("melody_conditioned.wav", wav[0].cpu(), sample_rate=32000)
+```
+
+### Stereo generation
+
+```python
+from audiocraft.models import MusicGen
+
+# Load stereo model
+model = MusicGen.get_pretrained('facebook/musicgen-stereo-medium')
+model.set_generation_params(duration=15)
+
+descriptions = ["ambient electronic music with wide stereo panning"]
+wav = model.generate(descriptions)
+
+# wav shape: [batch, 2, samples] for stereo
+print(f"Stereo shape: {wav.shape}")  # [1, 2, 480000]
+torchaudio.save("stereo.wav", wav[0].cpu(), sample_rate=32000)
+```
+
+### Audio continuation
+
+```python
+from transformers import AutoProcessor, MusicgenForConditionalGeneration
+
+processor = AutoProcessor.from_pretrained("facebook/musicgen-medium")
+model = MusicgenForConditionalGeneration.from_pretrained("facebook/musicgen-medium")
+
+# Load audio to continue
+import torchaudio
+audio, sr = torchaudio.load("intro.wav")
+
+# Process with text and audio
+inputs = processor(
+    audio=audio.squeeze().numpy(),
+    sampling_rate=sr,
+    text=["continue with a epic chorus"],
+    padding=True,
+    return_tensors="pt"
+)
+
+# Generate continuation
+audio_values = model.generate(**inputs, do_sample=True, guidance_scale=3, max_new_tokens=512)
+```
+
+## MusicGen-Style usage
+
+### Style-conditioned generation
+
+```python
+from audiocraft.models import MusicGen
+
+# Load style model
+model = MusicGen.get_pretrained('facebook/musicgen-style')
+
+# Configure generation with style
+model.set_generation_params(
+    duration=30,
+    cfg_coef=3.0,
+    cfg_coef_beta=5.0  # Style influence
+)
+
+# Configure style conditioner
+model.set_style_conditioner_params(
+    eval_q=3,          # RVQ quantizers (1-6)
+    excerpt_length=3.0  # Style excerpt length
+)
+
+# Load style reference
+style_audio, sr = torchaudio.load("reference_style.wav")
+
+# Generate with text + style
+descriptions = ["upbeat dance track"]
+wav = model.generate_with_style(descriptions, style_audio, sr)
+```
+
+### Style-only generation (no text)
+
+```python
+# Generate matching style without text prompt
+model.set_generation_params(
+    duration=30,
+    cfg_coef=3.0,
+    cfg_coef_beta=None  # Disable double CFG for style-only
+)
+
+wav = model.generate_with_style([None], style_audio, sr)
+```
+
+## AudioGen usage
+
+### Sound effect generation
+
+```python
+from audiocraft.models import AudioGen
+import torchaudio
+
+model = AudioGen.get_pretrained('facebook/audiogen-medium')
+model.set_generation_params(duration=10)
+
+# Generate various sounds
+descriptions = [
+    "thunderstorm with heavy rain and lightning",
+    "busy city traffic with car horns",
+    "ocean waves crashing on rocks",
+    "crackling campfire in forest"
+]
+
+wav = model.generate(descriptions)
+
+for i, audio in enumerate(wav):
+    torchaudio.save(f"sound_{i}.wav", audio.cpu(), sample_rate=16000)
+```
+
+## EnCodec usage
+
+### Audio compression
+
+```python
+from audiocraft.models import CompressionModel
+import torch
+import torchaudio
+
+# Load EnCodec
+model = CompressionModel.get_pretrained('facebook/encodec_32khz')
+
+# Load audio
+wav, sr = torchaudio.load("audio.wav")
+
+# Ensure correct sample rate
+if sr != 32000:
+    resampler = torchaudio.transforms.Resample(sr, 32000)
+    wav = resampler(wav)
+
+# Encode to tokens
+with torch.no_grad():
+    encoded = model.encode(wav.unsqueeze(0))
+    codes = encoded[0]  # Audio codes
+
+# Decode back to audio
+with torch.no_grad():
+    decoded = model.decode(codes)
+
+torchaudio.save("reconstructed.wav", decoded[0].cpu(), sample_rate=32000)
+```
+
+## Common workflows
+
+### Workflow 1: Music generation pipeline
+
+```python
+import torch
+import torchaudio
+from audiocraft.models import MusicGen
+
+class MusicGenerator:
+    def __init__(self, model_name="facebook/musicgen-medium"):
+        self.model = MusicGen.get_pretrained(model_name)
+        self.sample_rate = 32000
+
+    def generate(self, prompt, duration=30, temperature=1.0, cfg=3.0):
+        self.model.set_generation_params(
+            duration=duration,
+            top_k=250,
+            temperature=temperature,
+            cfg_coef=cfg
+        )
+
+        with torch.no_grad():
+            wav = self.model.generate([prompt])
+
+        return wav[0].cpu()
+
+    def generate_batch(self, prompts, duration=30):
+        self.model.set_generation_params(duration=duration)
+
+        with torch.no_grad():
+            wav = self.model.generate(prompts)
+
+        return wav.cpu()
+
+    def save(self, audio, path):
+        torchaudio.save(path, audio, sample_rate=self.sample_rate)
+
+# Usage
+generator = MusicGenerator()
+audio = generator.generate(
+    "epic cinematic orchestral music",
+    duration=30,
+    temperature=1.0
+)
+generator.save(audio, "epic_music.wav")
+```
+
+### Workflow 2: Sound design batch processing
+
+```python
+import json
+from pathlib import Path
+from audiocraft.models import AudioGen
+import torchaudio
+
+def batch_generate_sounds(sound_specs, output_dir):
+    """
+    Generate multiple sounds from specifications.
+
+    Args:
+        sound_specs: list of {"name": str, "description": str, "duration": float}
+        output_dir: output directory path
+    """
+    model = AudioGen.get_pretrained('facebook/audiogen-medium')
+    output_dir = Path(output_dir)
+    output_dir.mkdir(exist_ok=True)
+
+    results = []
+
+    for spec in sound_specs:
+        model.set_generation_params(duration=spec.get("duration", 5))
+
+        wav = model.generate([spec["description"]])
+
+        output_path = output_dir / f"{spec['name']}.wav"
+        torchaudio.save(str(output_path), wav[0].cpu(), sample_rate=16000)
+
+        results.append({
+            "name": spec["name"],
+            "path": str(output_path),
+            "description": spec["description"]
+        })
+
+    return results
+
+# Usage
+sounds = [
+    {"name": "explosion", "description": "massive explosion with debris", "duration": 3},
+    {"name": "footsteps", "description": "footsteps on wooden floor", "duration": 5},
+    {"name": "door", "description": "wooden door creaking and closing", "duration": 2}
+]
+
+results = batch_generate_sounds(sounds, "sound_effects/")
+```
+
+### Workflow 3: Gradio demo
+
+```python
+import gradio as gr
+import torch
+import torchaudio
+from audiocraft.models import MusicGen
+
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+def generate_music(prompt, duration, temperature, cfg_coef):
+    model.set_generation_params(
+        duration=duration,
+        temperature=temperature,
+        cfg_coef=cfg_coef
+    )
+
+    with torch.no_grad():
+        wav = model.generate([prompt])
+
+    # Save to temp file
+    path = "temp_output.wav"
+    torchaudio.save(path, wav[0].cpu(), sample_rate=32000)
+    return path
+
+demo = gr.Interface(
+    fn=generate_music,
+    inputs=[
+        gr.Textbox(label="Music Description", placeholder="upbeat electronic dance music"),
+        gr.Slider(1, 30, value=8, label="Duration (seconds)"),
+        gr.Slider(0.5, 2.0, value=1.0, label="Temperature"),
+        gr.Slider(1.0, 10.0, value=3.0, label="CFG Coefficient")
+    ],
+    outputs=gr.Audio(label="Generated Music"),
+    title="MusicGen Demo"
+)
+
+demo.launch()
+```
+
+## Performance optimization
+
+### Memory optimization
+
+```python
+# Use smaller model
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+# Clear cache between generations
+torch.cuda.empty_cache()
+
+# Generate shorter durations
+model.set_generation_params(duration=10)  # Instead of 30
+
+# Use half precision
+model = model.half()
+```
+
+### Batch processing efficiency
+
+```python
+# Process multiple prompts at once (more efficient)
+descriptions = ["prompt1", "prompt2", "prompt3", "prompt4"]
+wav = model.generate(descriptions)  # Single batch
+
+# Instead of
+for desc in descriptions:
+    wav = model.generate([desc])  # Multiple batches (slower)
+```
+
+### GPU memory requirements
+
+| Model | FP32 VRAM | FP16 VRAM |
+|-------|-----------|-----------|
+| musicgen-small | ~4GB | ~2GB |
+| musicgen-medium | ~8GB | ~4GB |
+| musicgen-large | ~16GB | ~8GB |
+
+## Common issues
+
+| Issue | Solution |
+|-------|----------|
+| CUDA OOM | Use smaller model, reduce duration |
+| Poor quality | Increase cfg_coef, better prompts |
+| Generation too short | Check max duration setting |
+| Audio artifacts | Try different temperature |
+| Stereo not working | Use stereo model variant |
+
+## References
+
+- **[Advanced Usage](references/advanced-usage.md)** - Training, fine-tuning, deployment
+- **[Troubleshooting](references/troubleshooting.md)** - Common issues and solutions
+
+## Resources
+
+- **GitHub**: https://github.com/facebookresearch/audiocraft
+- **Paper (MusicGen)**: https://arxiv.org/abs/2306.05284
+- **Paper (AudioGen)**: https://arxiv.org/abs/2209.15352
+- **HuggingFace**: https://huggingface.co/facebook/musicgen-small
+- **Demo**: https://huggingface.co/spaces/facebook/MusicGen
--- a/skills/mlops/models/audiocraft/references/advanced-usage.md
+++ b/skills/mlops/models/audiocraft/references/advanced-usage.md
@@ -0,0 +1,666 @@
+# AudioCraft Advanced Usage Guide
+
+## Fine-tuning MusicGen
+
+### Custom dataset preparation
+
+```python
+import os
+import json
+from pathlib import Path
+import torchaudio
+
+def prepare_dataset(audio_dir, output_dir, metadata_file):
+    """
+    Prepare dataset for MusicGen fine-tuning.
+
+    Directory structure:
+    output_dir/
+    ├── audio/
+    │   ├── 0001.wav
+    │   ├── 0002.wav
+    │   └── ...
+    └── metadata.json
+    """
+    output_dir = Path(output_dir)
+    audio_output = output_dir / "audio"
+    audio_output.mkdir(parents=True, exist_ok=True)
+
+    # Load metadata (format: {"path": "...", "description": "..."})
+    with open(metadata_file) as f:
+        metadata = json.load(f)
+
+    processed = []
+
+    for idx, item in enumerate(metadata):
+        audio_path = Path(audio_dir) / item["path"]
+
+        # Load and resample to 32kHz
+        wav, sr = torchaudio.load(str(audio_path))
+        if sr != 32000:
+            resampler = torchaudio.transforms.Resample(sr, 32000)
+            wav = resampler(wav)
+
+        # Convert to mono if stereo
+        if wav.shape[0] > 1:
+            wav = wav.mean(dim=0, keepdim=True)
+
+        # Save processed audio
+        output_path = audio_output / f"{idx:04d}.wav"
+        torchaudio.save(str(output_path), wav, sample_rate=32000)
+
+        processed.append({
+            "path": str(output_path.relative_to(output_dir)),
+            "description": item["description"],
+            "duration": wav.shape[1] / 32000
+        })
+
+    # Save processed metadata
+    with open(output_dir / "metadata.json", "w") as f:
+        json.dump(processed, f, indent=2)
+
+    print(f"Processed {len(processed)} samples")
+    return processed
+```
+
+### Fine-tuning with dora
+
+```bash
+# AudioCraft uses dora for experiment management
+# Install dora
+pip install dora-search
+
+# Clone AudioCraft
+git clone https://github.com/facebookresearch/audiocraft.git
+cd audiocraft
+
+# Create config for fine-tuning
+cat > config/solver/musicgen/finetune.yaml << 'EOF'
+defaults:
+  - musicgen/musicgen_base
+  - /model: lm/musicgen_lm
+  - /conditioner: cond_base
+
+solver: musicgen
+autocast: true
+autocast_dtype: float16
+
+optim:
+  epochs: 100
+  batch_size: 4
+  lr: 1e-4
+  ema: 0.999
+  optimizer: adamw
+
+dataset:
+  batch_size: 4
+  num_workers: 4
+  train:
+    - dset: your_dataset
+      root: /path/to/dataset
+  valid:
+    - dset: your_dataset
+      root: /path/to/dataset
+
+checkpoint:
+  save_every: 10
+  keep_every_states: null
+EOF
+
+# Run fine-tuning
+dora run solver=musicgen/finetune
+```
+
+### LoRA fine-tuning
+
+```python
+from peft import LoraConfig, get_peft_model
+from audiocraft.models import MusicGen
+import torch
+
+# Load base model
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+# Get the language model component
+lm = model.lm
+
+# Configure LoRA
+lora_config = LoraConfig(
+    r=8,
+    lora_alpha=16,
+    target_modules=["q_proj", "v_proj", "k_proj", "out_proj"],
+    lora_dropout=0.05,
+    bias="none"
+)
+
+# Apply LoRA
+lm = get_peft_model(lm, lora_config)
+lm.print_trainable_parameters()
+```
+
+## Multi-GPU Training
+
+### DataParallel
+
+```python
+import torch
+import torch.nn as nn
+from audiocraft.models import MusicGen
+
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+# Wrap LM with DataParallel
+if torch.cuda.device_count() > 1:
+    model.lm = nn.DataParallel(model.lm)
+
+model.to("cuda")
+```
+
+### DistributedDataParallel
+
+```python
+import torch.distributed as dist
+from torch.nn.parallel import DistributedDataParallel as DDP
+
+def setup(rank, world_size):
+    dist.init_process_group("nccl", rank=rank, world_size=world_size)
+    torch.cuda.set_device(rank)
+
+def train(rank, world_size):
+    setup(rank, world_size)
+
+    model = MusicGen.get_pretrained('facebook/musicgen-small')
+    model.lm = model.lm.to(rank)
+    model.lm = DDP(model.lm, device_ids=[rank])
+
+    # Training loop
+    # ...
+
+    dist.destroy_process_group()
+```
+
+## Custom Conditioning
+
+### Adding new conditioners
+
+```python
+from audiocraft.modules.conditioners import BaseConditioner
+import torch
+
+class CustomConditioner(BaseConditioner):
+    """Custom conditioner for additional control signals."""
+
+    def __init__(self, dim, output_dim):
+        super().__init__(dim, output_dim)
+        self.embed = torch.nn.Linear(dim, output_dim)
+
+    def forward(self, x):
+        return self.embed(x)
+
+    def tokenize(self, x):
+        # Tokenize input for conditioning
+        return x
+
+# Use with MusicGen
+from audiocraft.models.builders import get_lm_model
+
+# Modify model config to include custom conditioner
+# This requires editing the model configuration
+```
+
+### Melody conditioning internals
+
+```python
+from audiocraft.models import MusicGen
+from audiocraft.modules.codebooks_patterns import DelayedPatternProvider
+import torch
+
+model = MusicGen.get_pretrained('facebook/musicgen-melody')
+
+# Access chroma extractor
+chroma_extractor = model.lm.condition_provider.conditioners.get('chroma')
+
+# Manual chroma extraction
+def extract_chroma(audio, sr):
+    """Extract chroma features from audio."""
+    import librosa
+
+    # Compute chroma
+    chroma = librosa.feature.chroma_cqt(y=audio.numpy(), sr=sr)
+
+    return torch.from_numpy(chroma).float()
+
+# Use extracted chroma for conditioning
+chroma = extract_chroma(melody_audio, sample_rate)
+```
+
+## EnCodec Deep Dive
+
+### Custom compression settings
+
+```python
+from audiocraft.models import CompressionModel
+import torch
+
+# Load EnCodec
+encodec = CompressionModel.get_pretrained('facebook/encodec_32khz')
+
+# Access codec parameters
+print(f"Sample rate: {encodec.sample_rate}")
+print(f"Channels: {encodec.channels}")
+print(f"Cardinality: {encodec.cardinality}")  # Codebook size
+print(f"Num codebooks: {encodec.num_codebooks}")
+print(f"Frame rate: {encodec.frame_rate}")
+
+# Encode with specific bandwidth
+# Lower bandwidth = more compression, lower quality
+encodec.set_target_bandwidth(6.0)  # 6 kbps
+
+audio = torch.randn(1, 1, 32000)  # 1 second
+encoded = encodec.encode(audio)
+decoded = encodec.decode(encoded[0])
+```
+
+### Streaming encoding
+
+```python
+import torch
+from audiocraft.models import CompressionModel
+
+encodec = CompressionModel.get_pretrained('facebook/encodec_32khz')
+
+def encode_streaming(audio_stream, chunk_size=32000):
+    """Encode audio in streaming fashion."""
+    all_codes = []
+
+    for chunk in audio_stream:
+        # Ensure chunk is right shape
+        if chunk.dim() == 1:
+            chunk = chunk.unsqueeze(0).unsqueeze(0)
+
+        with torch.no_grad():
+            codes = encodec.encode(chunk)[0]
+            all_codes.append(codes)
+
+    return torch.cat(all_codes, dim=-1)
+
+def decode_streaming(codes_stream, output_stream):
+    """Decode codes in streaming fashion."""
+    for codes in codes_stream:
+        with torch.no_grad():
+            audio = encodec.decode(codes)
+            output_stream.write(audio.cpu().numpy())
+```
+
+## MultiBand Diffusion
+
+### Using MBD for enhanced quality
+
+```python
+from audiocraft.models import MusicGen, MultiBandDiffusion
+
+# Load MusicGen
+model = MusicGen.get_pretrained('facebook/musicgen-medium')
+
+# Load MultiBand Diffusion
+mbd = MultiBandDiffusion.get_mbd_musicgen()
+
+model.set_generation_params(duration=10)
+
+# Generate with standard decoder
+descriptions = ["epic orchestral music"]
+wav_standard = model.generate(descriptions)
+
+# Generate tokens and use MBD decoder
+with torch.no_grad():
+    # Get tokens
+    gen_tokens = model.generate_tokens(descriptions)
+
+    # Decode with MBD
+    wav_mbd = mbd.tokens_to_wav(gen_tokens)
+
+# Compare quality
+print(f"Standard shape: {wav_standard.shape}")
+print(f"MBD shape: {wav_mbd.shape}")
+```
+
+## API Server Deployment
+
+### FastAPI server
+
+```python
+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+import torch
+import torchaudio
+from audiocraft.models import MusicGen
+import io
+import base64
+
+app = FastAPI()
+
+# Load model at startup
+model = None
+
+@app.on_event("startup")
+async def load_model():
+    global model
+    model = MusicGen.get_pretrained('facebook/musicgen-small')
+    model.set_generation_params(duration=10)
+
+class GenerateRequest(BaseModel):
+    prompt: str
+    duration: float = 10.0
+    temperature: float = 1.0
+    cfg_coef: float = 3.0
+
+class GenerateResponse(BaseModel):
+    audio_base64: str
+    sample_rate: int
+    duration: float
+
+@app.post("/generate", response_model=GenerateResponse)
+async def generate(request: GenerateRequest):
+    if model is None:
+        raise HTTPException(status_code=500, detail="Model not loaded")
+
+    try:
+        model.set_generation_params(
+            duration=min(request.duration, 30),
+            temperature=request.temperature,
+            cfg_coef=request.cfg_coef
+        )
+
+        with torch.no_grad():
+            wav = model.generate([request.prompt])
+
+        # Convert to bytes
+        buffer = io.BytesIO()
+        torchaudio.save(buffer, wav[0].cpu(), sample_rate=32000, format="wav")
+        buffer.seek(0)
+
+        audio_base64 = base64.b64encode(buffer.read()).decode()
+
+        return GenerateResponse(
+            audio_base64=audio_base64,
+            sample_rate=32000,
+            duration=wav.shape[-1] / 32000
+        )
+
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+@app.get("/health")
+async def health():
+    return {"status": "ok", "model_loaded": model is not None}
+
+# Run: uvicorn server:app --host 0.0.0.0 --port 8000
+```
+
+### Batch processing service
+
+```python
+import asyncio
+from concurrent.futures import ThreadPoolExecutor
+import torch
+from audiocraft.models import MusicGen
+
+class MusicGenService:
+    def __init__(self, model_name='facebook/musicgen-small', max_workers=2):
+        self.model = MusicGen.get_pretrained(model_name)
+        self.executor = ThreadPoolExecutor(max_workers=max_workers)
+        self.lock = asyncio.Lock()
+
+    async def generate_async(self, prompt, duration=10):
+        """Async generation with thread pool."""
+        loop = asyncio.get_event_loop()
+
+        def _generate():
+            with torch.no_grad():
+                self.model.set_generation_params(duration=duration)
+                return self.model.generate([prompt])
+
+        # Run in thread pool
+        wav = await loop.run_in_executor(self.executor, _generate)
+        return wav[0].cpu()
+
+    async def generate_batch_async(self, prompts, duration=10):
+        """Process multiple prompts concurrently."""
+        tasks = [self.generate_async(p, duration) for p in prompts]
+        return await asyncio.gather(*tasks)
+
+# Usage
+service = MusicGenService()
+
+async def main():
+    prompts = ["jazz piano", "rock guitar", "electronic beats"]
+    results = await service.generate_batch_async(prompts)
+    return results
+```
+
+## Integration Patterns
+
+### LangChain tool
+
+```python
+from langchain.tools import BaseTool
+import torch
+import torchaudio
+from audiocraft.models import MusicGen
+import tempfile
+
+class MusicGeneratorTool(BaseTool):
+    name = "music_generator"
+    description = "Generate music from a text description. Input should be a detailed description of the music style, mood, and instruments."
+
+    def __init__(self):
+        super().__init__()
+        self.model = MusicGen.get_pretrained('facebook/musicgen-small')
+        self.model.set_generation_params(duration=15)
+
+    def _run(self, description: str) -> str:
+        with torch.no_grad():
+            wav = self.model.generate([description])
+
+        # Save to temp file
+        with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as f:
+            torchaudio.save(f.name, wav[0].cpu(), sample_rate=32000)
+            return f"Generated music saved to: {f.name}"
+
+    async def _arun(self, description: str) -> str:
+        return self._run(description)
+```
+
+### Gradio with advanced controls
+
+```python
+import gradio as gr
+import torch
+import torchaudio
+from audiocraft.models import MusicGen
+
+models = {}
+
+def load_model(model_size):
+    if model_size not in models:
+        model_name = f"facebook/musicgen-{model_size}"
+        models[model_size] = MusicGen.get_pretrained(model_name)
+    return models[model_size]
+
+def generate(prompt, duration, temperature, cfg_coef, top_k, model_size):
+    model = load_model(model_size)
+
+    model.set_generation_params(
+        duration=duration,
+        temperature=temperature,
+        cfg_coef=cfg_coef,
+        top_k=top_k
+    )
+
+    with torch.no_grad():
+        wav = model.generate([prompt])
+
+    # Save
+    path = "output.wav"
+    torchaudio.save(path, wav[0].cpu(), sample_rate=32000)
+    return path
+
+demo = gr.Interface(
+    fn=generate,
+    inputs=[
+        gr.Textbox(label="Prompt", lines=3),
+        gr.Slider(1, 30, value=10, label="Duration (s)"),
+        gr.Slider(0.1, 2.0, value=1.0, label="Temperature"),
+        gr.Slider(0.5, 10.0, value=3.0, label="CFG Coefficient"),
+        gr.Slider(50, 500, value=250, step=50, label="Top-K"),
+        gr.Dropdown(["small", "medium", "large"], value="small", label="Model Size")
+    ],
+    outputs=gr.Audio(label="Generated Music"),
+    title="MusicGen Advanced",
+    allow_flagging="never"
+)
+
+demo.launch(share=True)
+```
+
+## Audio Processing Pipeline
+
+### Post-processing chain
+
+```python
+import torch
+import torchaudio
+import torchaudio.transforms as T
+import numpy as np
+
+class AudioPostProcessor:
+    def __init__(self, sample_rate=32000):
+        self.sample_rate = sample_rate
+
+    def normalize(self, audio, target_db=-14.0):
+        """Normalize audio to target loudness."""
+        rms = torch.sqrt(torch.mean(audio ** 2))
+        target_rms = 10 ** (target_db / 20)
+        gain = target_rms / (rms + 1e-8)
+        return audio * gain
+
+    def fade_in_out(self, audio, fade_duration=0.1):
+        """Apply fade in/out."""
+        fade_samples = int(fade_duration * self.sample_rate)
+
+        # Create fade curves
+        fade_in = torch.linspace(0, 1, fade_samples)
+        fade_out = torch.linspace(1, 0, fade_samples)
+
+        # Apply fades
+        audio[..., :fade_samples] *= fade_in
+        audio[..., -fade_samples:] *= fade_out
+
+        return audio
+
+    def apply_reverb(self, audio, decay=0.5):
+        """Apply simple reverb effect."""
+        impulse = torch.zeros(int(self.sample_rate * 0.5))
+        impulse[0] = 1.0
+        impulse[int(self.sample_rate * 0.1)] = decay * 0.5
+        impulse[int(self.sample_rate * 0.2)] = decay * 0.25
+
+        # Convolve
+        audio = torch.nn.functional.conv1d(
+            audio.unsqueeze(0),
+            impulse.unsqueeze(0).unsqueeze(0),
+            padding=len(impulse) // 2
+        ).squeeze(0)
+
+        return audio
+
+    def process(self, audio):
+        """Full processing pipeline."""
+        audio = self.normalize(audio)
+        audio = self.fade_in_out(audio)
+        return audio
+
+# Usage with MusicGen
+from audiocraft.models import MusicGen
+
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+model.set_generation_params(duration=10)
+
+wav = model.generate(["chill ambient music"])
+processor = AudioPostProcessor()
+wav_processed = processor.process(wav[0].cpu())
+
+torchaudio.save("processed.wav", wav_processed, sample_rate=32000)
+```
+
+## Evaluation
+
+### Audio quality metrics
+
+```python
+import torch
+from audiocraft.metrics import CLAPTextConsistencyMetric
+from audiocraft.data.audio import audio_read
+
+def evaluate_generation(audio_path, text_prompt):
+    """Evaluate generated audio quality."""
+    # Load audio
+    wav, sr = audio_read(audio_path)
+
+    # CLAP consistency (text-audio alignment)
+    clap_metric = CLAPTextConsistencyMetric()
+    clap_score = clap_metric.compute(wav, [text_prompt])
+
+    return {
+        "clap_score": clap_score,
+        "duration": wav.shape[-1] / sr
+    }
+
+# Batch evaluation
+def evaluate_batch(generations):
+    """Evaluate multiple generations."""
+    results = []
+    for gen in generations:
+        result = evaluate_generation(gen["path"], gen["prompt"])
+        result["prompt"] = gen["prompt"]
+        results.append(result)
+
+    # Aggregate
+    avg_clap = sum(r["clap_score"] for r in results) / len(results)
+    return {
+        "individual": results,
+        "average_clap": avg_clap
+    }
+```
+
+## Model Comparison
+
+### MusicGen variants benchmark
+
+| Model | CLAP Score | Generation Time (10s) | VRAM |
+|-------|------------|----------------------|------|
+| musicgen-small | 0.35 | ~5s | 2GB |
+| musicgen-medium | 0.42 | ~15s | 4GB |
+| musicgen-large | 0.48 | ~30s | 8GB |
+| musicgen-melody | 0.45 | ~15s | 4GB |
+| musicgen-stereo-medium | 0.41 | ~18s | 5GB |
+
+### Prompt engineering tips
+
+```python
+# Good prompts - specific and descriptive
+good_prompts = [
+    "upbeat electronic dance music with synthesizer leads and punchy drums at 128 bpm",
+    "melancholic piano ballad with strings, slow tempo, emotional and cinematic",
+    "funky disco groove with slap bass, brass section, and rhythmic guitar"
+]
+
+# Bad prompts - too vague
+bad_prompts = [
+    "nice music",
+    "song",
+    "good beat"
+]
+
+# Structure: [mood] [genre] with [instruments] at [tempo/style]
+```
--- a/skills/mlops/models/audiocraft/references/troubleshooting.md
+++ b/skills/mlops/models/audiocraft/references/troubleshooting.md
@@ -0,0 +1,504 @@
+# AudioCraft Troubleshooting Guide
+
+## Installation Issues
+
+### Import errors
+
+**Error**: `ModuleNotFoundError: No module named 'audiocraft'`
+
+**Solutions**:
+```bash
+# Install from PyPI
+pip install audiocraft
+
+# Or from GitHub
+pip install git+https://github.com/facebookresearch/audiocraft.git
+
+# Verify installation
+python -c "from audiocraft.models import MusicGen; print('OK')"
+```
+
+### FFmpeg not found
+
+**Error**: `RuntimeError: ffmpeg not found`
+
+**Solutions**:
+```bash
+# Ubuntu/Debian
+sudo apt-get install ffmpeg
+
+# macOS
+brew install ffmpeg
+
+# Windows (using conda)
+conda install -c conda-forge ffmpeg
+
+# Verify
+ffmpeg -version
+```
+
+### PyTorch CUDA mismatch
+
+**Error**: `RuntimeError: CUDA error: no kernel image is available`
+
+**Solutions**:
+```bash
+# Check CUDA version
+nvcc --version
+python -c "import torch; print(torch.version.cuda)"
+
+# Install matching PyTorch
+pip install torch torchaudio --index-url https://download.pytorch.org/whl/cu121
+
+# For CUDA 11.8
+pip install torch torchaudio --index-url https://download.pytorch.org/whl/cu118
+```
+
+### xformers issues
+
+**Error**: `ImportError: xformers` related errors
+
+**Solutions**:
+```bash
+# Install xformers for memory efficiency
+pip install xformers
+
+# Or disable xformers
+export AUDIOCRAFT_USE_XFORMERS=0
+
+# In Python
+import os
+os.environ["AUDIOCRAFT_USE_XFORMERS"] = "0"
+from audiocraft.models import MusicGen
+```
+
+## Model Loading Issues
+
+### Out of memory during load
+
+**Error**: `torch.cuda.OutOfMemoryError` during model loading
+
+**Solutions**:
+```python
+# Use smaller model
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+# Force CPU loading first
+import torch
+device = "cpu"
+model = MusicGen.get_pretrained('facebook/musicgen-small', device=device)
+model = model.to("cuda")
+
+# Use HuggingFace with device_map
+from transformers import MusicgenForConditionalGeneration
+model = MusicgenForConditionalGeneration.from_pretrained(
+    "facebook/musicgen-small",
+    device_map="auto"
+)
+```
+
+### Download failures
+
+**Error**: Connection errors or incomplete downloads
+
+**Solutions**:
+```python
+# Set cache directory
+import os
+os.environ["AUDIOCRAFT_CACHE_DIR"] = "/path/to/cache"
+
+# Or for HuggingFace
+os.environ["HF_HOME"] = "/path/to/hf_cache"
+
+# Resume download
+from huggingface_hub import snapshot_download
+snapshot_download("facebook/musicgen-small", resume_download=True)
+
+# Use local files
+model = MusicGen.get_pretrained('/local/path/to/model')
+```
+
+### Wrong model type
+
+**Error**: Loading wrong model for task
+
+**Solutions**:
+```python
+# For text-to-music: use MusicGen
+from audiocraft.models import MusicGen
+model = MusicGen.get_pretrained('facebook/musicgen-medium')
+
+# For text-to-sound: use AudioGen
+from audiocraft.models import AudioGen
+model = AudioGen.get_pretrained('facebook/audiogen-medium')
+
+# For melody conditioning: use melody variant
+model = MusicGen.get_pretrained('facebook/musicgen-melody')
+
+# For stereo: use stereo variant
+model = MusicGen.get_pretrained('facebook/musicgen-stereo-medium')
+```
+
+## Generation Issues
+
+### Empty or silent output
+
+**Problem**: Generated audio is silent or very quiet
+
+**Solutions**:
+```python
+import torch
+
+# Check output
+wav = model.generate(["upbeat music"])
+print(f"Shape: {wav.shape}")
+print(f"Max amplitude: {wav.abs().max().item()}")
+print(f"Mean amplitude: {wav.abs().mean().item()}")
+
+# If too quiet, normalize
+def normalize_audio(audio, target_db=-14.0):
+    rms = torch.sqrt(torch.mean(audio ** 2))
+    target_rms = 10 ** (target_db / 20)
+    gain = target_rms / (rms + 1e-8)
+    return audio * gain
+
+wav_normalized = normalize_audio(wav)
+```
+
+### Poor quality output
+
+**Problem**: Generated music sounds bad or noisy
+
+**Solutions**:
+```python
+# Use larger model
+model = MusicGen.get_pretrained('facebook/musicgen-large')
+
+# Adjust generation parameters
+model.set_generation_params(
+    duration=15,
+    top_k=250,          # Increase for more diversity
+    temperature=0.8,    # Lower for more focused output
+    cfg_coef=4.0        # Increase for better text adherence
+)
+
+# Use better prompts
+# Bad: "music"
+# Good: "upbeat electronic dance music with synthesizers and punchy drums"
+
+# Try MultiBand Diffusion
+from audiocraft.models import MultiBandDiffusion
+mbd = MultiBandDiffusion.get_mbd_musicgen()
+tokens = model.generate_tokens(["prompt"])
+wav = mbd.tokens_to_wav(tokens)
+```
+
+### Generation too short
+
+**Problem**: Audio shorter than expected
+
+**Solutions**:
+```python
+# Check duration setting
+model.set_generation_params(duration=30)  # Set before generate
+
+# Verify in generation
+print(f"Duration setting: {model.generation_params}")
+
+# Check output shape
+wav = model.generate(["prompt"])
+actual_duration = wav.shape[-1] / 32000
+print(f"Actual duration: {actual_duration}s")
+
+# Note: max duration is typically 30s
+```
+
+### Melody conditioning fails
+
+**Error**: Issues with melody-conditioned generation
+
+**Solutions**:
+```python
+import torchaudio
+from audiocraft.models import MusicGen
+
+# Load melody model (not base model)
+model = MusicGen.get_pretrained('facebook/musicgen-melody')
+
+# Load and prepare melody
+melody, sr = torchaudio.load("melody.wav")
+
+# Resample to model sample rate if needed
+if sr != 32000:
+    resampler = torchaudio.transforms.Resample(sr, 32000)
+    melody = resampler(melody)
+
+# Ensure correct shape [batch, channels, samples]
+if melody.dim() == 1:
+    melody = melody.unsqueeze(0).unsqueeze(0)
+elif melody.dim() == 2:
+    melody = melody.unsqueeze(0)
+
+# Convert stereo to mono
+if melody.shape[1] > 1:
+    melody = melody.mean(dim=1, keepdim=True)
+
+# Generate with melody
+model.set_generation_params(duration=min(melody.shape[-1] / 32000, 30))
+wav = model.generate_with_chroma(["piano cover"], melody, 32000)
+```
+
+## Memory Issues
+
+### CUDA out of memory
+
+**Error**: `torch.cuda.OutOfMemoryError: CUDA out of memory`
+
+**Solutions**:
+```python
+import torch
+
+# Clear cache before generation
+torch.cuda.empty_cache()
+
+# Use smaller model
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+# Reduce duration
+model.set_generation_params(duration=10)  # Instead of 30
+
+# Generate one at a time
+for prompt in prompts:
+    wav = model.generate([prompt])
+    save_audio(wav)
+    torch.cuda.empty_cache()
+
+# Use CPU for very large generations
+model = MusicGen.get_pretrained('facebook/musicgen-small', device="cpu")
+```
+
+### Memory leak during batch processing
+
+**Problem**: Memory grows over time
+
+**Solutions**:
+```python
+import gc
+import torch
+
+def generate_with_cleanup(model, prompts):
+    results = []
+
+    for prompt in prompts:
+        with torch.no_grad():
+            wav = model.generate([prompt])
+            results.append(wav.cpu())
+
+        # Cleanup
+        del wav
+        gc.collect()
+        torch.cuda.empty_cache()
+
+    return results
+
+# Use context manager
+with torch.inference_mode():
+    wav = model.generate(["prompt"])
+```
+
+## Audio Format Issues
+
+### Wrong sample rate
+
+**Problem**: Audio plays at wrong speed
+
+**Solutions**:
+```python
+import torchaudio
+
+# MusicGen outputs at 32kHz
+sample_rate = 32000
+
+# AudioGen outputs at 16kHz
+sample_rate = 16000
+
+# Always use correct rate when saving
+torchaudio.save("output.wav", wav[0].cpu(), sample_rate=sample_rate)
+
+# Resample if needed
+resampler = torchaudio.transforms.Resample(32000, 44100)
+wav_resampled = resampler(wav)
+```
+
+### Stereo/mono mismatch
+
+**Problem**: Wrong number of channels
+
+**Solutions**:
+```python
+# Check model type
+print(f"Audio channels: {wav.shape}")
+# Mono: [batch, 1, samples]
+# Stereo: [batch, 2, samples]
+
+# Convert mono to stereo
+if wav.shape[1] == 1:
+    wav_stereo = wav.repeat(1, 2, 1)
+
+# Convert stereo to mono
+if wav.shape[1] == 2:
+    wav_mono = wav.mean(dim=1, keepdim=True)
+
+# Use stereo model for stereo output
+model = MusicGen.get_pretrained('facebook/musicgen-stereo-medium')
+```
+
+### Clipping and distortion
+
+**Problem**: Audio has clipping or distortion
+
+**Solutions**:
+```python
+import torch
+
+# Check for clipping
+max_val = wav.abs().max().item()
+print(f"Max amplitude: {max_val}")
+
+# Normalize to prevent clipping
+if max_val > 1.0:
+    wav = wav / max_val
+
+# Apply soft clipping
+def soft_clip(x, threshold=0.9):
+    return torch.tanh(x / threshold) * threshold
+
+wav_clipped = soft_clip(wav)
+
+# Lower temperature during generation
+model.set_generation_params(temperature=0.7)  # More controlled
+```
+
+## HuggingFace Transformers Issues
+
+### Processor errors
+
+**Error**: Issues with MusicgenProcessor
+
+**Solutions**:
+```python
+from transformers import AutoProcessor, MusicgenForConditionalGeneration
+
+# Load matching processor and model
+processor = AutoProcessor.from_pretrained("facebook/musicgen-small")
+model = MusicgenForConditionalGeneration.from_pretrained("facebook/musicgen-small")
+
+# Ensure inputs are on same device
+inputs = processor(
+    text=["prompt"],
+    padding=True,
+    return_tensors="pt"
+).to("cuda")
+
+# Check processor configuration
+print(processor.tokenizer)
+print(processor.feature_extractor)
+```
+
+### Generation parameter errors
+
+**Error**: Invalid generation parameters
+
+**Solutions**:
+```python
+# HuggingFace uses different parameter names
+audio_values = model.generate(
+    **inputs,
+    do_sample=True,           # Enable sampling
+    guidance_scale=3.0,       # CFG (not cfg_coef)
+    max_new_tokens=256,       # Token limit (not duration)
+    temperature=1.0
+)
+
+# Calculate tokens from duration
+# ~50 tokens per second
+duration_seconds = 10
+max_tokens = duration_seconds * 50
+audio_values = model.generate(**inputs, max_new_tokens=max_tokens)
+```
+
+## Performance Issues
+
+### Slow generation
+
+**Problem**: Generation takes too long
+
+**Solutions**:
+```python
+# Use smaller model
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+
+# Reduce duration
+model.set_generation_params(duration=10)
+
+# Use GPU
+model.to("cuda")
+
+# Enable flash attention if available
+# (requires compatible hardware)
+
+# Batch multiple prompts
+prompts = ["prompt1", "prompt2", "prompt3"]
+wav = model.generate(prompts)  # Single batch is faster than loop
+
+# Use compile (PyTorch 2.0+)
+model.lm = torch.compile(model.lm)
+```
+
+### CPU fallback
+
+**Problem**: Generation running on CPU instead of GPU
+
+**Solutions**:
+```python
+import torch
+
+# Check CUDA availability
+print(f"CUDA available: {torch.cuda.is_available()}")
+print(f"CUDA device: {torch.cuda.get_device_name(0)}")
+
+# Explicitly move to GPU
+model = MusicGen.get_pretrained('facebook/musicgen-small')
+model.to("cuda")
+
+# Verify model device
+print(f"Model device: {next(model.lm.parameters()).device}")
+```
+
+## Common Error Messages
+
+| Error | Cause | Solution |
+|-------|-------|----------|
+| `CUDA out of memory` | Model too large | Use smaller model, reduce duration |
+| `ffmpeg not found` | FFmpeg not installed | Install FFmpeg |
+| `No module named 'audiocraft'` | Not installed | `pip install audiocraft` |
+| `RuntimeError: Expected 3D tensor` | Wrong input shape | Check tensor dimensions |
+| `KeyError: 'melody'` | Wrong model for melody | Use musicgen-melody |
+| `Sample rate mismatch` | Wrong audio format | Resample to model rate |
+
+## Getting Help
+
+1. **GitHub Issues**: https://github.com/facebookresearch/audiocraft/issues
+2. **HuggingFace Forums**: https://discuss.huggingface.co
+3. **Paper**: https://arxiv.org/abs/2306.05284
+
+### Reporting Issues
+
+Include:
+- Python version
+- PyTorch version
+- CUDA version
+- AudioCraft version: `pip show audiocraft`
+- Full error traceback
+- Minimal reproducible code
+- Hardware (GPU model, VRAM)