An apparatus, method and computer program where the apparatus comprises: at least one memory configured to store a computer program comprising computer program instructions; and at least one processor configured to execute the computer program instructions to cause the apparatus at least to perform: obtaining, from at least one detector, a detection of at least one bio-signal from at least one user where the user is using a user output device; determining from the at least one obtained bio-signal that movement of the user's head is about to occur; and in response to determining that movement of the user's head is about to occur, enabling the processor to control the output provided by the user output device to coordinate with the movement of the user's head.