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@johncarlosbaez@mathstodon.xyz @julesh@mathstodon.xyz ​see also guitarists who play fretless guitars and adjust tuning on the fly. Humans do some pretty amazing things on occasion.

# source.content
[@johncarlosbaez@mathstodon.xyz](https://mathstodon.xyz/users/johncarlosbaez) [@julesh@mathstodon.xyz](https://mathstodon.xyz/users/julesh) ​see also guitarists who play fretless guitars and adjust tuning on the fly. Humans do some pretty amazing things on occasion.