# 🧾 VoiceBill AI – Voice-Powered Autonomous Invoice Generator

**VoiceBill AI** is a fully autonomous, intelligent agent that generates professional invoices directly from user voice commands. It uses state-of-the-art audio-language models like **Qwen2-Audio-7B-Instruct** to interpret voice, extract structured data using **Pydantic**, cross-check and auto-complete information from a local database, and generates polished PDF invoices using **ReportLab** — all wrapped in a clean **Gradio** UI.

> 🎯 Designed for freelancers, SMBs, and enterprises that need intelligent, conversational billing — fast.

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## 🚀 Demo

<div align="center">

[![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/your-repo/VoiceBill_AI/blob/main/InvoiceGenerator.ipynb)

<!-- [![Watch the demo](https://img.youtube.com/vi/VIDEO_ID_HERE/maxresdefault.jpg)](https://www.youtube.com/watch?v=VIDEO_ID_HERE) -->

</div>

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## 🗣️ Input Audio Samples

Here are the audio inputs that were used for invoice generation:

- 🔊 [John Doe's Invoice Request](https://git.gyannetra.in/HardikSankhla/VoiceInvoiceAI_Demo/raw/main/audio_inputs/audio1JohnDoe.wav)
- 🔊 [Sarah Miller's Invoice Request](https://git.gyannetra.in/HardikSankhla/VoiceInvoiceAI_Demo/raw/main/audio_inputs/audio2SarahMilller.wav)

## 📊 Results

Here is a sample output invoice generated by VoiceBill AI:

<p align="center">
  <table>
    <tr>
      <td align="center"><strong>Generated Invoice - Page 1</strong></td>
      <td align="center"><strong>Generated Invoice - Page 2</strong></td>
    </tr>
    <tr>
      <td><img src="https://git.gyannetra.in/HardikSankhla/VoiceInvoiceAI_Demo/raw/main/generated_invoices/Screenshot%202025-06-25%20191909.png" width="400"/></td>
      <td><img src="https://git.gyannetra.in/HardikSankhla/VoiceInvoiceAI_Demo/raw/main/generated_invoices/Screenshot%202025-06-25%20191924.png" width="400"/></td>
    </tr>
  </table>
</p>


## 🎯 Objective

Enable users to **speak naturally** about invoice requirements while the AI:

- Understands and parses spoken content
- Auto-fills missing fields from local memory
- Follows up with intelligent prompts if any required field is missing
- Builds and exports a **professional PDF invoice**
- Works seamlessly via a user-friendly Gradio UI

---

## 🧠 System Workflow

1. **🎙️ Voice Input**:  
   User says: _"Generate an invoice for Ramesh for 2 iPhones and 1 MacBook."_

2. **🧠 AI Model (Qwen2-Audio)**:  
   Extracts structured data like:
   - Client: Ramesh
   - Items: iPhone, MacBook
   - Quantity: 2, 1

3. **📦 Local DB Checks**:  
   - If Ramesh exists → fetch data  
   - If item details missing → asks user  
   - Stores/update user/item info in DB

4. **✅ Data Validation**:  
   Validates structured input using **Pydantic**

5. **📄 Invoice Generation**:  
   Generates professional PDF using **ReportLab**

6. **🌐 UI**:  
   All happens within an intuitive Gradio interface

---

## 🛠️ Tech Stack

| Function             | Tool / Library                             |
|----------------------|--------------------------------------------|
| Voice-to-Text        | [Qwen2-Audio-7B-Instruct](https://huggingface.co/Qwen/Qwen2-Audio-7B-Instruct) |
| Structured Validation| [Pydantic](https://docs.pydantic.dev/)     |
| Audio Processing     | [Librosa](https://librosa.org/)            |
| UI Interface         | [Gradio](https://www.gradio.app/)          |
| PDF Invoice Builder  | [ReportLab](https://www.reportlab.com/)    |
| Runtime              | Python 3.10+, Google Colab/GPU             |

---

## 📦 Features

✅ AI-powered voice input → invoice  
✅ Auto-fill from local user/item DB  
✅ Modular, structured data validation  
✅ Dynamic follow-up on missing fields  
✅ Clean, professional invoice layout (PDF)  
✅ Gradio UI for real-time interaction  
✅ Supports 8-bit model loading (via bitsandbytes)

---

## 📁 Folder Structure

```python
    VoiceBill_AI/
    │
    ├── InvoiceGenerator.ipynb     # Main pipeline notebook
    ├── requirements.txt           # Install dependencies
    ├── audio_inputs/              # Uploaded or recorded audio
    ├── generated_invoices/        # Output PDFs saved here
    └── README.md                  # This file
```
----

## ⚙️ Setup

✅ In Colab

- Open notebook in Colab
- Ensure GPU is enabled: Runtime > Change Runtime Type > GPU
- Run all cells

✅ Local (Experimental)

```python
$ git clone https://github.com/your-username/VoiceBill_AI.git
$ cd VoiceBill_AI
$ pip install -r requirements.txt
$ python run_app.py  # Optional: if converted to Python script
```

---

## 🧩 Missing Data Handling (Agentic)

- User Info Missing? → “Who is the client?”
- Item Info Missing? → “What’s the price for iPhone 15?”
- GST or Address Missing? → Prompt and update DB
- User Updates Info? → Accept and sync to local DB

---

## 📌 Future Enhancements

- Multi-language support via Whisper or MMS
- Full agent framework with LangChain/Ollama integration
- Database integration (PostgreSQL/SQLite)
- REST API and Streamlit frontend
- Voice-based editing of previous invoices

---

## 🙌 Credits

Developed by [Gyannetra Pvt Ltd ™](https://www.gyannetra.com/)
Built to simplify billing using cutting-edge AI and local models.
Made with 💜 and Python.