Functionality is described for allowing a first user to select a sound item. The first user can use a first device to send this sound item to a second device operated by a second user. Upon the occurrence of a triggering event, the sound item selected by the first user can be presented by the second device to the second user. The first device and the second device may correspond to two devices in an Instant Messaging (IM) system. According to another illustrative aspect, functionality is described that allows the first user to select the new sound item from a source sound item by adjusting the position and/or size (e.g., width) of a graphical selection unit that is presented over a graphical depiction of the source sound item.