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-# Standalone ONNX Voice Changer Service
+# 🎙️ Standalone ONNX Real-Time Voice Changer Service
 
-Layanan pengubah suara real-time berbasis AI berlatensi rendah menggunakan akselerasi ONNX Runtime dan model RVC (Retrieval-based Voice Conversion).
+A high-performance, low-latency, real-time voice conversion system powered by **ONNX Runtime** and **Retrieval-based Voice Conversion (RVC)**. This application enables real-time voice conversion from a microphone/browser source to a designated target character model with minimal processing latency.
 
-## Struktur Proyek
-- `server.py`: WebSocket server utama yang memproses streaming audio dan menyajikan static HTTP frontend.
-- `frontend/`: File UI web client (HTML, CSS, JS).
-- `lib/`: Modul inferensi ONNX RVC.
-- `weights/`: Tempat penyimpanan model suara (folder per model berisi file `.onnx` dan opsional file `.pth`).
-- `pretrained/`: Model pra-latih dasar (seperti `vec-768-layer-12.onnx`).
-- `rmvpe.pt` & `rmvpe.py`: Untuk ekstraksi pitch suara fidelitas tinggi.
+---
 
-## Cara Menjalankan
+## ✨ Key Features
+* **🚀 WebSocket Audio Pipeline:** Streaming audio transfer using binary WebSocket connections (raw PCM float32) for minimal overhead.
+* **⚡ Multi-Backend ONNX Acceleration:** Supports execution providers including NVIDIA `CUDA`, AMD/Intel `DirectML`, and fallback `CPU`.
+* **🎼 High-Fidelity DSP Pipeline:**
+  * **Low-Cut Filter:** Active 1st order Butterworth high-pass filter at 80Hz to eliminate AC hum and rumble.
+  * **Noise Gate:** Threshold-based noise suppression to bypass inference during silence (saving CPU/GPU cycles).
+  * **Gain Controls:** Independent input/output digital gain staging.
+* **🧠 Advanced Pitch Extraction:** Optimized 16kHz pitch prediction using the RMVPE (Retrieval-based Minimum Vocal Pitch Estimation) model.
+* **🌐 Dual Routing Architecture:** Supports routing audio via the web browser (Web Audio API) or directly through the server's local audio hardware (using `sounddevice`).
 
-### Persyaratan Sistem
-Pastikan Python 3.10+ sudah terinstal di sistem Anda beserta library yang dibutuhkan di `requirements.txt`.
+---
 
-### Menjalankan Server
-Jalankan server menggunakan Python dari environment Anda:
-```bash
-python server.py --host 127.0.0.1 --port 8765 --http_port 8000
+## 🛠️ System Architecture
+
+```mermaid
+graph TD
+    A[Microphone / Web Browser] -->|Web Audio API| B(WebSocket Connection)
+    B -->|Raw Float32 PCM Chunk| C[server.py Backend]
+    C -->|1. High-Pass Filter 80Hz| D[DSP Stage]
+    D -->|2. Gain & Noise Gate| D
+    D -->|3. Resample to 16kHz| E[Hubert/ContentVec ONNX]
+    D -->|4. Pitch Estimation RMVPE| F[Pitch Predictor]
+    E --> G[RVC ONNX Model Inference]
+    F --> G
+    G -->|Target Audio Chunks| H(WebSocket Connection)
+    H -->|Play audio| I[Browser Speakers / Audio Device]
 ```
 
-Parameter opsional:
-- `--host`: Alamat host WebSocket server (default: `127.0.0.1`).
-- `--port`: Port WebSocket server (default: `8765`).
-- `--http_port`: Port HTTP server untuk UI web client (default: `8000`).
-- `--device`: Execution Provider (`cpu`, `cuda`, atau `dml` - default: `cuda`).
-- `--model`: Nama folder model suara di dalam `weights/` yang ingin dimuat langsung saat start.
+---
 
-Setelah server berjalan, Web UI akan otomatis terbuka di browser Anda pada alamat `http://localhost:8000`.
+## 📁 Repository Structure
+* [server.py](file:///M:/Users/ahmad/project/onnx-voice-changer/server.py) — The main WebSocket backend and static HTTP server managing connection loops, audio resampling, and model execution.
+* [start.bat](file:///M:/Users/ahmad/project/onnx-voice-changer/start.bat) — Windows launcher batch file that automatically resolves the Python virtual environment and executes the server.
+* [requirements.txt](file:///M:/Users/ahmad/project/onnx-voice-changer/requirements.txt) — Python dependencies list.
+* [frontend/](file:///M:/Users/ahmad/project/onnx-voice-changer/frontend) — Contains client-side Web UI files:
+  * [frontend/index.html](file:///M:/Users/ahmad/project/onnx-voice-changer/frontend/index.html) — Control interface layout.
+  * [frontend/app.js](file:///M:/Users/ahmad/project/onnx-voice-changer/frontend/app.js) — WebSocket communication and client-side audio rendering.
+  * [frontend/styles.css](file:///M:/Users/ahmad/project/onnx-voice-changer/frontend/styles.css) — Custom dashboard styling.
+* [lib/](file:///M:/Users/ahmad/project/onnx-voice-changer/lib) — core package containing inference models and prediction tools.
+* [weights/](file:///M:/Users/ahmad/project/onnx-voice-changer/weights) — Directory for voice model weights. Place your custom `.onnx` and `.pth` model sub-directories here.
+* [pretrained/](file:///M:/Users/ahmad/project/onnx-voice-changer/pretrained) — Directory containing base pre-trained models such as `vec-768-layer-12.onnx` or `vec-256-layer-12.onnx`.
+
+---
+
+## 🚀 Getting Started
+
+### 📋 Prerequisites
+* **Python 3.10+** (Recommended)
+* **FFmpeg** installed and added to the system PATH (Required for audio processing utilities).
+* (Optional) **NVIDIA CUDA Toolkit** (v11.x/12.x) and **cuDNN** for GPU execution acceleration.
+
+### 📦 Installation
+1. Clone this repository to your local directory.
+2. Initialize and activate a virtual environment (optional but recommended):
+   ```bash
+   python -m venv venv
+   .\venv\Scripts\activate
+   ```
+3. Install the required dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+4. Place your ContentVec base model (`vec-768-layer-12.onnx` or `vec-256-layer-12.onnx`) inside the [pretrained/](file:///M:/Users/ahmad/project/onnx-voice-changer/pretrained) directory.
+5. Place your character models in [weights/](file:///M:/Users/ahmad/project/onnx-voice-changer/weights) in structured folders (e.g., `weights/HuTao/` containing `HuTao.onnx` and `HuTao.pth`).
+
+### 🏃 Running the Server
+
+#### Option A: Quick Launch (Windows)
+Simply double-click the [start.bat](file:///M:/Users/ahmad/project/onnx-voice-changer/start.bat) file. It will automatically detect Python, set up the directory paths, and launch the service.
+
+#### Option B: Manual CLI execution
+Execute the server using your terminal:
+```bash
+python server.py --host 127.0.0.1 --port 8765 --http_port 8000 --device cuda
+```
+
+### ⚙️ Command-Line Arguments
+| Argument | Description | Default |
+|---|---|---|
+| `--host` | The address the WebSocket server binds to. | `127.0.0.1` |
+| `--port` | WebSocket communication port. | `8765` |
+| `--http_port`| Port serving the static frontend Web UI. | `8000` |
+| `--device` | The ONNX Runtime execution device (`cpu`, `cuda`, `dml`). | `cuda` |
+| `--model` | Target folder name in `weights/` to load directly upon startup. | `None` |
+
+Once the server begins execution, it will spin up the local server, and your Web UI should open automatically at `http://localhost:8000`.
+
+---
+
+## 🔊 Audio DSP Details
+To achieve low latency without output artifacts, the audio processing utilizes:
+1. **Sliding Window Context Buffer:** Keeps a short historical buffer of the audio to feed the model the required context frames while minimizing output audio delay.
+2. **Convolution Padding Fadeout:** 120ms of trailing silent padding is temporarily appended to input segments to avoid edge-fading anomalies inherent to RVC convolutional steps.
+3. **Linear Resampling:** Low-overhead linear interpolation for quick sample rate adaptation.