Among other things, methods, systems and computer program products are disclosed for manipulating media. In one aspect, synchronization of media files involves identifying a change to an attribute associated with a media file associated with a first media file library located on the host system; accessing a client device list including device IDs for devices associated with the first media file library; identifying a first client device indicated by the device list; accessing a first synchronization order file stored on a server system; modifying the first synchronization order file to indicate the change to the attribute associated with the media file; and providing the modified first synchronization order file to the server system to enable the first client device to apply the indicated change to the attribute associated with the media file within a second media file library located on the first client device.