EmotivPRO v3.0
  • EmotivPRO
  • Getting started
    • System requirements
    • Install EMOTIV Launcher
    • Installing EmotivPRO onto your PC or Mac
    • Updating EmotivPRO
    • Logging into EmotivPRO
    • Creating an EmotivID and password
    • Forgotten password
    • Viewing your account information
    • Logging out of EmotivPRO
  • EmotivPRO license options
    • Purchasing an EmotivPRO license
    • Changing the number of seats in your license
    • Organization License
    • Using EmotivPRO offline
    • Cancelling your EmotivPRO license
  • Connecting your headset to EmotivPRO and fitting your headset
    • Connecting your EEG headset to EmotivPRO via Bluetooth
      • Bluetooth connection troubleshooting
    • Pairing your EEG headset with a USB receiver dongle
    • Connecting your EEG headset to EmotivPRO
    • Disconnecting your EEG headset from EmotivPRO
    • Fitting your EEG headset
    • Contact quality map
      • Contact Quality (CQ) vs. EEG Quality (EQ)
  • Using EmotivPRO
    • EmotivPRO home screen and menu
    • EEG quality indicator
    • Battery indicator
    • EPOC+ and EPOC X configurations
  • Data Streams
    • Real time data streams, recording, and playback
    • Raw EEG
    • Frequency Bands
    • Performance Metrics
    • Motion
    • Data Packets
  • Recordings
    • About recordings
    • Starting and stopping a recording
    • Baseline recording
    • Adding a note to a recording
    • Timer
  • Event markers
    • About event markers
    • Baseline markers
    • Serial port markers
    • Keystroke markers
    • USB markers
    • EMOTIV Extender triggering
  • Managing your EEG data recordings
    • Recordings history list
    • Cloud synchronization
    • Playing an EEG data recording
    • Deleting an EEG recording
    • Exporting an EEG data recording
      • EDF files
      • EDF+ / BDF+
      • CSV files
      • JSON files
    • Editing an EEG data recording note
    • Closing a recording
    • Timestamp correction
  • Lab Streaming Layer (LSL)
    • About LSL
    • LSL Outlet
    • LSL Inlet
  • D-Lab Client
    • About D-Lab Client
    • Exporting D-Lab settings from EmotivPRO
    • Starting a Network Data Stream
    • Creating recordings on D-Lab
  • Exported data files
    • Opening a locally saved EDF file
    • Converting EDF files to CSV files
  • Notes on the data
    • DC Offset
    • Code Examples
  • EmotivPro Builder
    • Building experiments with EmotivPRO Builder
  • EmotivPRO Analyzer
    • Analyzing your EEG data with EmotivPRO Analyzer
  • Using Organization Licensing
    • Important notes on Organization Licensing
    • Licensing
    • User roles and permissions
    • Inviting users
    • Accepting an Organization invitation
    • Removing users
    • Organization Data Sharing
  • Release Notes
    • v3.0
    • v3.0.1
    • v3.2
    • v3.2.1
    • v3.3
    • v3.4.1
    • v3.5
    • v3.5.3
    • v3.7.0
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  1. Data Streams

Frequency Bands

PreviousRaw EEGNextPerformance Metrics

Last updated 3 years ago

How to view frequency information

Frequency Analysis can be found in the menu on the left-hand side of the EmotivPRO screen.

The Frequency Analysis view allows you to see frequency information of a single EEG channel.

Selecting an EEG channel

To select an EEG channel:

  1. Click on the eye icon, next to Channel, at the top-right-hand corner of the screen.

  2. A pop-up box will open showing the channels you can select

  3. Click on the channels you want to see.

  4. To close the pop-up box, click anywhere outside of the box.

Selecting a window

To select a window:

  1. Click on the drop-down menu next to Window at the top right-hand corner of the screen.

  2. Select either:

    • Hanning,

    • Hamming,

    • Hann,

    • Blackman, or

    • Rectangle.

Fast Fourier Transform (FFT) graph

The graph at the top of the Frequency Information view displays an FFT analysis of the selected EEG channel as dB over frequency (Hz). You can adjust the parameters using the controls on the left-hand-side of the screen.

‌The parameters include:

  • amax, amin - Adjust the maximum and minimum amplitude (dB) for the y-axis

  • fmax, fmin - Adjust the maximum and minimum frequency (Hz) for the x-axis

  • length - Adjust the transform length for the FFT analysis

  • step - Adjust the step size for the FFT analysis

Band power graph

The bar graph at the bottom of the Frequency Information view displays the power of theta (4-8Hz), alpha (8-12Hz), low beta (12-16Hz), high beta (16-25Hz) and gamma (25-45Hz) frequencies for the channel selected.

You can adjust the parameters using the controls at the bottom left-hand-side of the screen.

The parameters include:

  • ‌pmax, pmin - Adjust the maximum and minimum amplitude for the y-axis

  • autoscale - Automatically scale the data to fit the max value on the y-axis and update the y-axis appropriately

‌You can choose to export the time series values of these five frequency bands for each sensor on your headset when you export data. You can view the format of these files here.