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Digitally recorded especially for audio give us many advantage in data processing or manipulation. However<br />digitally recorded also avoid violation of data royalty like illegally duplicating, cropping half or all of data and<br />disttributing without permission from owner of audio data. Based on that problem, there are need one proving<br />system for digital media, and watermarking technique can be applied for that purpose.<br />The model design conducted with sets of system model method and watermarking method will apllied is Echo<br />Hiding Technique.Analysis is by testing emmbedding and extracting watermark testing, capacity embedding testing<br />and robustnes of watermark attack test.<br />Analysys test for watermarking technique showing degradation of perceptual quality of audio file after<br />watermarked. In extraction test , Echo Hiding technique, watermark recovery rate depend on initial amplitude. There<br />is no change in size of audio file before and after watermarking process. In robustness test result that Echo hiding<br />Technique have highly robustness.