A computer-implemented method comprising: switching between a first mode for controlling a relative position of a virtual sound object from a notional listener in a virtual space (90,20) in dependence upon a point of view of the notional listener and a second mode for controlling the relative position of the virtual sound object from the notional listener in the virtual space (90,20) in dependence upon the point of view of the notional listener, wherein a transition from the first mode to the second mode occurs when a distance of a virtual sound object from the notional listener in virtual space decreases below a threshold, and wherein during the first mode there is a first dependency of the relative position of the virtual sound object from the notional listener upon a currently determined relative position of the virtual sound object from the notional listener in the virtual space (90,20) based on the current measured location of a user in a real space and during the second mode there is a second dependency of the relative position of the virtual sound object from the notional listener upon a currently determined relative position of the virtual sound object from the notional listener in the virtual space (90,20) based on the current measured location of the user in the real space, wherein the first dependency is a higher dependency than the second dependency such that a magnitude of a differential of the relative position of the virtual sound object from the notional listener with respect to the currently determined relative position of the virtual sound object from the notional listener in the virtual space is larger in the first mode than in the second mode. switching between a first mode for controlling a relative position of a virtual sound object from a notional listener in a virtual space (90,20) in dependence upon a point of view of the notional listener and a second mode for controlling the relative position of the virtual sound object from the notional listener in the virtual space (90,20) in dependence upon the point of view of the notional listener, wherein a transition from the first mode to the second mode occurs when a distance of a virtual sound object from the notional listener in virtual space decreases below a threshold, and wherein during the first mode there is a first dependency of the relative position of the virtual sound object from the notional listener upon a currently determined relative position of the virtual sound object from the notional listener in the virtual space (90,20) based on the current measured location of a user in a real space and during the second mode there is a second dependency of the relative position of the virtual sound object from the notional listener upon a currently determined relative position of the virtual sound object from the notional listener in the virtual space (90,20) based on the current measured location of the user in the real space, wherein the first dependency is a higher dependency than the second dependency such that a magnitude of a differential of the relative position of the virtual sound object from the notional listener with respect to the currently determined relative position of the virtual sound object from the notional listener in the virtual space is larger in the first mode than in the second mode.