A method and computing system for seamlessly inserting a local audio clip into a primary audio stream. The method sends the primary audio stream to an audio output port, and determines main parameters for the primary audio stream. The method receives a request to insert an encoded local audio clip, locates an insertion point in the primary audio stream that coincides with an end of a frame boundary, and identifies a best matching encoded local audio clip for the main parameters. The method receives and sends the best matching encoded local audio clip to the audio output port, stores the primary audio stream in a buffer while sending the best matching encoded local audio clip, and resumes the sending of the primary audio stream when the sending of the best matching encoded local audio clip is complete.