The very first batch of devices has been shipped without these changes though and you might still experience this behavior. You can set a default playback device for each speaker, Smart Display, and Smart Clock. * For Tobii M-Series devices, these steps are done for you by Tobii before shipping the M-Series. If you are not sure which type of default to use, simply try to first one (0) and if doesn't work as expected then try the others (1 and 2).

Verify that the primary audio device - for a Boombotix Rex speaker 'Headphones - Boombotix REX Stereo' is enabled and set as the default audio device There are actually 3 type of default device you can set - Console (0), Multimedia (1), and Communications (2).

Locate the secondary audio device - for a Boombotix Rex speaker 'Headset Earphone - Boombotix REX Hands-Free'.

Right click the volume icon in the Windows notification area.

Make sure your Bluetooth speaker is paired to your computer.

Solution (here as an example for a Boombotix Rex speaker):* After waiting some time, approximately a minute, it starts working again. In this case, and after playing the 'Skype and Bluetooth.' sound, the others (Windows Default Device) will just produce a quiet scraping noise. If you have a Bluetooth speaker connected, it might add a secondary audio device which might be set to Windows Default Communication device. This will finally bring up the usable Windows 7 sound control panel. You need to scroll all the way down to the bottom and click on Sound control panel. Heres a picture of my playback devices tab. Pressing the play button next to each device will play a small signal. If you click App volume and device preferences, another giant dialog lets you set custom output volume for a few apps. I can only set them to Default Communications Device or not default anything.

The audio devices in Tobii Communicator are all set to 'Windows Default Device' except 'Skype and Bluetooth Mobile Phone Calls' which is set to 'Windows Default Communication Device'.

Set default communication device