---
license: mit
language: [en]
tags: [text-to-speech, vits, ax650, ax620e, ax637, npu, onnx]
pipeline_tag: text-to-speech
---

# Inflect-Micro-v2 for AXera NPU

High-quality English TTS (VITS) optimized for **AX650 / AX620E / AX637** NPUs.

| Chip | Encoder | Decoder | Precision |
|------|---------|---------|-----------|
| **AX650** | NPU (axmodel) | NPU (axmodel) | U16 |
| **AX620E** | NPU (axmodel) | CPU (onnxruntime) | U16 |
| **AX637** | NPU (axmodel) | CPU (onnxruntime) | U16 |

## 🎧 Audio Samples (AX650 NPU)

**"Hello and welcome to Inflect Micro V2 text to speech."**
<audio controls src="https://huggingface.co/AXERA-TECH/inflect_micro_v2/resolve/main/samples/en_hello.wav"></audio>

**"The weather today is sunny with a gentle breeze."**
<audio controls src="https://huggingface.co/AXERA-TECH/inflect_micro_v2/resolve/main/samples/en_weather.wav"></audio>

**"Once upon a time, there lived a curious robot who loved to sing."**
<audio controls src="https://huggingface.co/AXERA-TECH/inflect_micro_v2/resolve/main/samples/en_story.wav"></audio>

**"Neural voice synthesis is the next frontier of AI."**
<audio controls src="https://huggingface.co/AXERA-TECH/inflect_micro_v2/resolve/main/samples/en_tech.wav"></audio>

**"This audio was generated entirely on the AX650 NPU chip."**
<audio controls src="https://huggingface.co/AXERA-TECH/inflect_micro_v2/resolve/main/samples/en_intro.wav"></audio>

## 🚀 Quick Start

```bash
bash setup.sh
bash run.sh "Hello world." output.wav cli ax650
```

## 📁 Structure

```
models/
  ax650/   — full NPU (encoder + decoder axmodel)
  ax620e/  — encoder axmodel + decoder ONNX
  ax637/   — encoder axmodel + decoder ONNX
python/    — Python SDK
cpp/       — C++ SDK
samples/   — audio samples
```