Just three tips to be aware under windows 10 :
- first always check the sound icon is ok, don’t forget to plug headphones as example
- second, do not install spi 3.2 portable version to “Downloads” folder as Windows translates the name into “Téléchargements”, french people will get some errors due to accents presence. So install into something like d:/audio/
- remove jackrouter https://forum.openmpt.org/index.php?topic=6110.0
May it helps