@aaelony yeah you can't use the internal server on 64-bit windows. Also there is an issue where the verbosity flags were changed around in a recent version of synth server. There is a pull request for it, but the code to fix that issue causes another issue because of the way it tries to find the synth server version. I modified the code to always fix the verbosity flags and it worked for me after that
So if you're on windows, to use overtone out of the box you have to use the external synth server with version 3.6 or below
otherwise you have to clone the overtone project, modify src/overtone/sc/machinery/server/args.clj to uppercase the verbosity flags, and use your modified overtone project as a dependency in your project.
Thanks @gdeer81, will try that at next opportunity, hopefully this weekend..