The [data](https://doi.org/10.5061/dryad.dncjsxm85) is licensed under a CC0 1.0 Universal (CC0 1.0) Public Domain Dedication license. Please cite [Card et al. “An Accurate and Rapidly Calibrating Speech Neuroprosthesis” (2024) *New England Journal of Medicine*](https://www.nejm.org/doi/full/10.1056/NEJMoa2314132) in any work that uses the data.