I initially read this as whistle to text, which would be way cooler.

A good project for training an llm

https://en.wikipedia.org/wiki/Silbo_Gomero

I've met folks that descend from the Zapotec in southern Mexico, and they still use whistling language to talk to each other across mountain valleys.

There are still people speaking a whisking language in the south-west of France[1], not many but it's being taught in school there to preserve it[2]

[1]: https://fr.wikipedia.org/wiki/Langage_siffl%C3%A9_d%27Aas

[2]: https://www.dailymotion.com/video/x4lxhsi

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Just like Marvel's Yondu!