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The paper addresses an information embedding audio coder based on the MPEG-4 scalable lossless coding system. By replacing the last part of the bitstream in each frame with a fixed amount of embedded information, the proposed truncator is able to truncate the bitstream without affecting the embedded information. Evaluation results show that the bitstream with the proposed technique is able to carry a maximum of 512 bytes embedded information. These are achieved with low added complexity and no bitstream size expansion.