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  1. EEG Data Cleaning

    Gaia
    by Gaia · April 2025
    Hi Gaia, as long as your filters and DSP processing has fixed parameters, it should not make any difference. If the processing is 'adaptive' to the content, then it is better to separate.
  2. EEG Data Cleaning

    wjcroft
    by wjcroft · April 2025
    Hi Gaia, as long as your filters and DSP processing has fixed parameters, it should not make any difference. If the processing is 'adaptive' to the content, then it is better to separate.
  3. how to remove scalar factor from text file generated from GUI

    wjcroft
    by wjcroft · March 2025
    https://www.google.com/search?q=comparing+DSP+filter+types+butterworth+bessel+elliptic+etc
  4. How to Save Filtered Data in OpenBCI GUI?

    wjcroft
    by wjcroft · December 2024
    In signal processing EEG, it is generally recommended to minimize the number of filtering steps, as each additional DSP filtering pass introduces slight degradations in the signal quality. That is the
  5. Odd frequency spikes

    wjcroft
    by wjcroft · November 2024
    Here are the types of DSP filters: bandpass (specifying a range), low pass, high pass, bandstop (or notch). You apparently have a bandpass from say .4 Hz to 30 Hz. DSP filters also have a 'type' such
  6. How to use python or Brainflow to smooth uvrms in GUI?

    wjcroft
    by wjcroft · September 2024
    Have you considered a tutorial on DSP Digital Signal Processing. Many exist in many different computer language libraries, including Matlab.
  7. Delay or Latency Between Sensors and On-Screen Feedback

    wjcroft
    by wjcroft · August 2024
    https://www.google.com/search?q=dsp+filter+delay
  8. filtering and phase shift?

    wjcroft
    by wjcroft · April 2024
    All DSP digital filters introduce some amount of phase shift. If you are applying similar filter parameters to each channel you are using, then ALL channels will shift the same amount. Thus you can co
  9. plotting brain states - beta, alpha, theta, etc. over time

    wjcroft
    by wjcroft · March 2024
    https://www.google.com/search?q=python+dsp+tutorial
  10. plotting brain states - beta, alpha, theta, etc. over time

    wjcroft
    by wjcroft · March 2024
    The 'minimal' required steps to do the DSP Digital Signal Processing are shown in that Python program. As you can see there are a significant number of steps, such as computing the FFT, and then separ
  11. Problem regarding the EEG signals captured

    wjcroft
    by wjcroft · February 2024
    The recording / raw data files from the GUI, are RAW. NO filters have been applied. You need to use a DSP library (digital signal processing) that has filters to apply, at the minimum: say a bandpass
  12. Cortex Mark IV EEG head and Arduino for controlling fingers movement

    wjcroft
    by wjcroft · February 2024
    Arduino boards are underpowered for DSP digital signal processing. You would be better off with something like a Raspberry Pi, then you can plug the dongle directly into the Pi.
  13. Ecg analog out from Cyton

    wjcroft
    by wjcroft · January 2024
    In addition to the DSP functions in Brainflow, there are a plethora of DSP libraries available in every conceivable computer language.
  14. issue building OPENBCI_GUI in Processing ?

    wjcroft
    by wjcroft · September 2023
    As far as analysis / DSP digital signal processing goes -- this is much better done with external DSP libraries, packages, for some examples see,
  15. noise, high impedance: electrode cap with Cyton+Daisy

    Saima
    by Saima · March 2023
    Do the results look normal with the GUI, but extremely low with your Matlab? In that case, suspect your Matlab DSP operations.
  16. noise, high impedance: electrode cap with Cyton+Daisy

    wjcroft
    by wjcroft · March 2023
    Do the results look normal with the GUI, but extremely low with your Matlab? In that case, suspect your Matlab DSP operations.
  17. Data collection with LSL

    wjcroft
    by wjcroft · February 2023
    Ah, forgot that the LSL Networking Widget does not show the proper label for the 'filtering' buttons. In any event it sounds as if the filtering feature is not working, is that your experience? If thi
  18. Cyton RC pre-filter values

    wjcroft
    by wjcroft · January 2023
    No DSP filtering happens on the Cyton. The GUI recording file is raw, no filtering. But the GUI screen display filtering can be adjusted with the menus.
  19. ADS1299 to Cyton Pins

    Josh_IML
    by Josh_IML · September 2022
    Godspeed!
  20. How to attenuate artifacts from muscle movement and head movement?

    wjcroft
    by wjcroft · August 2022
    In general, the 'easiest' approach is to try to minimize head, face and eye movements during recording. The above paper contrasts different signal processing methods that can be applied to 'automatica
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