Hi, thank you very much for your reply. Indeed, your code is working on my CtrlX Core as well. Digging in, I found the difference to be that I used the Google voice, not the one from Microsoft (which is also default). Upon changing that, my original approach also works on my Core. Not sure why that is, though, particularily since everything is fine on the VirtualCore. Do you have working google voices on the Core? Background in case somebody is interested: I wanted to have a spoken warning message when a limit switch is reached by the drive. In the attached code, I brought this to life with two different text messages in different languages, that are synthesized with two different voices and played in an endless loop until the limit switch is not active any more. Only thing that bugged me a bit: I could not figure out how to interrupt the speech immediately when the switch is deactivated. Instead, it always finishes the message it has started. Cheers, Markus
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