A method for modifying an audio parameter based on a gesture, the method comprising: displaying a first virtual object that comprises a visual representation of an ambient audio event in a first region of a volumetric display, wherein the ambient audio event spans a portion of a sound space and the first virtual object spans a corresponding portion of the volumetric display; wherein the volumetric display allows the user to interact with the first virtual object associated with the ambient audio events and re-position the first virtual object within a virtual three-dimensional space in order to modify a position at which the ambient audio event is reproduced within the sound space; displaying a notification associated with an incoming voice call in the first region, wherein the notification overlaps the first virtual object in the first region; acquiring (910; 1020) sensor data associated with a hand of a user; analyzing (920; 1030) the sensor data to determine at least one hand position; determining (930; 1030, 1040, 1050), based on the at least one hand position, that an interaction between the first virtual object and a second virtual object that is associated with the hand of the user is occurring; determining, via a physics model, a second location of the first virtual object within the volumetric display based on the interaction between the first virtual object and the second virtual object; modifying one or more parameters of the ambient audio source based on the second location of the first virtual object to cause the portion of the sound space spanned by the audio event to be resized such that the notification associated with the incoming voice call is displayed in the volumetric display in a part not covered by the first virtual object in the second location, but which was covered by the first virtual object in the first location; and causing the resized ambient sound to be reproduced for output to the user; causing the incoming phone call to be rendered as a point audio source in the sound space at the location of the notification associated with the incoming voice call such that the visual representation of the audio events reflect or match the locations of the audio events within the sound space. displaying a first virtual object that comprises a visual representation of an ambient audio event in a first region of a volumetric display, wherein the ambient audio event spans a portion of a sound space and the first virtual object spans a corresponding portion of the volumetric display; wherein the volumetric display allows the user to interact with the first virtual object associated with the ambient audio events and re-position the first virtual object within a virtual three-dimensional space in order to modify a position at which the ambient audio event is reproduced within the sound space; displaying a notification associated with an incoming voice call in the first region, wherein the notification overlaps the first virtual object in the first region; acquiring (910; 1020) sensor data associated with a hand of a user; analyzing (920; 1030) the sensor data to determine at least one hand position; determining (930; 1030, 1040, 1050), based on the at least one hand position, that an interaction between the first virtual object and a second virtual object that is associated with the hand of the user is occurring; determining, via a physics model, a second location of the first virtual object within the volumetric display based on the interaction between the first virtual object and the second virtual object; modifying one or more parameters of the ambient audio source based on the second location of the first virtual object to cause the portion of the sound space spanned by the audio event to be resized such that the notification associated with the incoming voice call is displayed in the volumetric display in a part not covered by the first virtual object in the second location, but which was covered by the first virtual object in the first location; and causing the resized ambient sound to be reproduced for output to the user; causing the incoming phone call to be rendered as a point audio source in the sound space at the location of the notification associated with the incoming voice call such that the visual representation of the audio events reflect or match the locations of the audio events within the sound space.