I am going to stick my neck out (and with depleted vision) and say "what speaker?"
I do not believe your stick has an internal speaker. At a minimum, it is not in the tech spec.
I checked that too, but I can't understand why I have a playback device showing, called Speakers - Intel SST Audio Device (WDM)
I thought there must be something tiny inside for system sounds.
This message was posted on behalf of Intel Corporation
As Al Hill said, there is not an internal speaker in the Compute Stick, check the Intel® STK1AW32SC’s TPS