In the future, there should be more and more software to support vocal simulation. Although the functions are still relatively basic at present, the iterative version will support more functions, including the adjustment of speech speed/intonation. the new industry of DVDFab mentioned that their new product line - BookFab will update in the future. BookFab AudioBook Creator V3.0 will support custom voice cloning, with upgrades for multilingual adaptation and emotional expression. Additionally, it will include a simple audio editor for audio editing.https://dvdfab.cn/audiobook-creator.htm But we still cannot verify it, just wait and see. Hope you can find a great sollution.