Suddenly no sound from my speakers.

Aloha T,

Here is an approach.

Try going to:
Menu—>Devices—>Device Setup—>VST Audio System

and make sure your audio device is selected
in the ‘ASIO Driver’ pop-up. (upper right corner)

Then go to:

Menu—>Devices—>VST Connections—>Outputs.

And make sure the output routing is correct.

Good Luck!
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