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I'd be interested to know an estimated bitrate. Texting is a very low bandwidth signal that has a lot of utility. If it's comparable to what a person can do with two thumbs I can imagine some really awesome things I could create with this tech.

I wish I could justify purchasing the hardware, or had an audience. Haha.

I'm also worried about direct interference between EEG and TMS (and EMI is quite common) -- I'd prefer they let the user perform the action physically instead of being electrical-in, electrical-out. The researchers come from an accredited institution, so it probably checks out, but seems like an obvious oversight.

Yes, very low bandwidth. Active BCIs based on EEG are extremely unreliable and/or exhausting to use