Update README.md

README.md

@@ -25,6 +25,11 @@ I release my output under MIT License.If you want your license ,convert it by yo
 ## How to Convert
 ### Export Model
 see Matcha-TTS [ONNX export](https://github.com/shivammehta25/Matcha-TTS)
+
+```
+python -m matcha.onnx.export matcha_vctk.ckpt vctk_t2.onnx --vocoder-name "hifigan_T2_v1" --vocoder-checkpoint "generator_v1"
+```
+
 ### simplify model
 ```
 from onnxsim import simplify