arXiv Computation and Language By Timothy Tin-Long, Jian Zhu, Aidan Pine, Mengzhe Geng

AudioNoisePrints: Model-free audio watermarking using spatial correlation in flow matching TTS

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AudioNoisePrints is a training‑free audio watermarking pipeline designed for flow‑matching and diffusion TTS models. It leverages strong spatial correlations between the initial Gaussian noise and the generated output, using a simple cosine correlation to embed the watermark while adding minimal inference overhead. A lightweight detector is trained to handle aggressive augmentations, and the method outperforms the AudioSeal baseline on F5TTS and other TTS/vocoder models, indicating broad applicability to flow‑matching TTS and potentially vocoders.

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