⚡ Live Sandbox: AI Dev Tool: YuE2 Frontier Music

📝 Editable Code Sandbox

```python
# AI Dev Tool: MusicTheory21 Vector Search Micro-SaaS
# Description: A FastAPI Pydantic v2 Micro-SaaS for music theory vector search
# Author: [Your Name]

from fastapi import FastAPI, Depends
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from typing import List, Optional
import psycopg2
from psycopg2 import Error
from psycopg2.extras import DictCursor
import numpy as np
from PIL import Image
import io
import base64
from steganography import Steganography

# PostgreSQL connection settings
POSTGRES_HOST = "localhost"
POSTGRES_DB = "musictheory"
POSTGRES_USER = "musictheoryuser"
POSTGRES_PASSWORD = "musictheorypassword"

# Initialize FastAPI app
app = FastAPI()

# Define music theory model
class MusicTheory(BaseModel):
    id: int
    title: str
    description: str
    vector: List[float]

# Define steganography model
class SteganographyModel(BaseModel):
    image: str
    message: str

# Define PostgreSQL connection
def get_db_connection():
    try:
        connection = psycopg2.connect(
            host=POSTGRES_HOST,
            database

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