Patent attributes
An apparatus including circuitry configured for: displaying content within a viewport; displaying a symbol representing a sound source within the viewport; detecting one or more gestures that place the displayed symbol in the displayed content; disambiguating between a first placement method, performed for the symbol, that locks the sound source to a position that moves with displayed content moving within the viewport and a second placement method performed for the symbol that is different to the first placement method and locks the sound source to a position that does not move with displayed content moving within the viewport, wherein the first placement method includes a disambiguating gesture relative to the viewport, for the symbol, indicating movement of the symbol relative to the viewport that disambiguates the first placement method from the second placement method.