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Audio Letters

Inventor

DENSO Advanced Testing & Evaluation Div. / Jun Hasegawa

An “audio letter” that turns your message into music matching its emotion and embeds the text in the sound itself.

Audio Letters

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Audio Letters

About This Work

Users type a message of about 100 characters. A generative AI reads its emotion, tone, and context, and composes a short piece of music to match. At the same time, the original text is embedded in the audio using acoustic steganography (watermarking), so recipients first experience it as music, while their device can decode the playback and reconstruct the exact message—emotion for humans, data for machines.

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