Does EmotivPRO automatically remove artifacts from the EEG data collected?

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No, the data is recorded directly as it is received from the headset. There is a significant amount of signal processing and filtering in the headset to remove mains noise and harmonic frequencies, which is why the signals look so clean when you have good contact quality. We sample at 2048Hz, apply a dual notch filter at 50Hz and 60Hz and a low pass filter at 64Hz, then we filter the data down to 128 or 256Hz for transmission.