Responsive to an incoming telephone call, a session server consults pre-stored caller preferences to generate a source file of caller-specific audio content, then conducts an interactive playback session audibly presenting the content to the caller. Each call's source file may include an internally stored...http://www.google.de/patents/US6775358?utm_source=gb-gplus-sharePatent US6775358 - Method and system for enhanced interactive playback of audio content to telephone callers
