Sennheiser BTD 500 USB Notice D'emploi page 10

Settings in the operating system
Most computers will automatically recognize the con-
nected adapter as the default audio device; the audio
signal is then transmitted to your Bluetooth headset.
To manually set your adapter as the default audio device:
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Microsoft Windows
In the Control Panel, select "Sound".
In the "Playback", "Recording" and „Communication"
tabs, select "BTD 500 USB" as the default device.
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Apple Mac OS
In System Preferences, select "Sound".
Click the "Output" tab.
Select "BTD 500 USB".
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