This paper presents a novel method to recover lost packets in music streaming using a synthesizer to generate percussive sounds. As an improvement of the state-of-the-art system that uses a content-based audio codebook, the new method can greatly reduce the redundant information needed to recover perceptually critical lost packets. Categories and Subject Descriptors H5.5 [Information Interfaces and Presentation]: Sound and Music Computing – Signal analysis, synthesis, and processing. General Terms Algorithms, Performance, Reliability, Human Factors. Keywords Music streaming, sound synthesis, packet error recovery.