Did you turn off all filters? ... To see it properly, do what the SDK docs say: turn all filters off

Did you turn off all filters?

GUI displays have already applied the filters. This applies to all windows. However, the recordings are always raw, no filters.

https://docs.openbci.com/Software/OpenBCISoftware/GUIWidgets/#filters

A true signal tens of millivolts is in the range of 10,000 uV for Cyton. This is easily seen. But you will need to turn off any high pass filters to see it. The default OpenBCI_GUI filter spec may be

* Branchless State Rotation (Zero-Jitter 'if' Processing)We completely eliminated conditional statements (if statements) from the core execution path to prevent CPU pipeline flushes. Noise mitigation

• Passive RC filters at the input — anti-aliasing and RF protection

thank you very much for your response. Of course, I have already completed the "getting derailed" steps and also tried different filters, hardware settings, and locations. In my opinion, it

There are no filters that can remove the WIDE-BAND noise you showed. If the noise is narrow band it could be filtered, at the expense of losing that portion of your EEG information.

Since the filters applied in the GUI, only affect the visual Time Series display, not the recording, it is safe to merely remove some of the DC offset with the appropriate filter values. A typical low

https://docs.openbci.com/Software/OpenBCISoftware/GUIWidgets/#filters

5. Check that you have specified the correct sampling frequency in your scripts filters. Because the plots might seem to indicate the presence of the Alpha peak, but according to the x-axis on a much

As you have concluded, the 60 Hz mains noise is absolutely HUGE and swamps out all biosignals. This is why we use bandpass AND notch filters together. The AC is so strong, that it forms 'harmonics' wi

When I turn off all notch filters and band pass filters* and then I hold the end of my computer charger in my hand while i'm wearing electrodes (lateral eog) I see this consistent pattern:

The GUI and BrainFlow always save the raw, unfiltered data, to file. This gives users the freedom to apply other filters during playback or analysis.

re: GUI filtering. Yes filters only apply to the GUI screens. The recording files and Brainflow stream are always raw and unfiltered.

1. Question on Filters and the GUI Display vs. Saved Data

* Filtering: Used two different band-pass filters: 0.2-10 Hz (for P300) and 0.1-30 Hz (for N400).

* Environmental notch filters

If you are matching the filter values in the Filters section of the GUI, your time series should be pretty close.