Using ONNX versions of RVC audio models in the Voice Changer offers potential benefits for real-time voice conversion. By importing an .onnx file instead of a .pth file, you may experience improved speed, as some tests suggest that .onnx files may be faster than .pth files for this purpose. Additionally, if you have a .pth file and wish to convert it to .onnx, you can utilize W-Okada's Voice Changer by selecting the desired model and clicking "Export to .onnx". Experimentation with .onnx files is recommended to determine which option best suits your needs.