Lab Streaming Layer (LSL)
Notes on the data
Keystroke markers
Keystroke markers are an easy way to manually add event data into your data stream if high temporal precision of these markers is not a priority.
Keystroke marker settings are saved to your local device.

Adding a new keystroke marker

To add a new keystroke marker:
  1. 1.
    Click on Settings which can be found at the top right-hand side of EmotivPRO.
  2. 2.
    Click on Keystroke marking from the menu on the left-hand side of the screen
  3. 3.
    Click on Add new keystroke marker
  4. 4.
    Input values for:
    1. 1.
      Key - the keystroke on your PC to activate the marker.
    2. 2.
      Description - a summary or name for this marker.
    3. 3.
      Value - a unique numeric value (integer between 0 and 255) that will represent this marker in the recording timeline and exported data file.
  5. 5.
    Click on Add to save your new keystroke marker.

Editing a keystroke marker

To edit a keystroke marker:
  1. 1.
    Hover your mouse over the keystroke marker you want to edit.
  2. 2.
    Click on the edit icon (pencil icon).
  3. 3.
    The Edit Keystroke Marker window will open. You can then edit the Keystroke, Label, and Value of your chosen keystroke marker.
  4. 4.
    Click on the Save button to save your changes.

Deleting a keystroke marker

To delete a keystroke marker:
  1. 1.
    Hover your mouse over the keystroke marker you want to delete.
  2. 2.
    Click on the trash can icon to delete the keystroke marker.

Keystroke marker configuration

Keystroke marker configuration allows you to add your own keystroke marker settings to EmotivPRO and save them for future experiments.
Keystroke marker configurations are automatically saved to EMOTIV Cloud—so you can use them on any device with EmotivPRO.

Creating a new keystroke marker configuration

To create a new keystroke marker configuration:
  1. 1.
    Click on Settings which can be found at the top right-hand side of EmotivPRO.
  2. 2.
    Click on Keystroke marking from the menu on the left-hand side of the screen.
  3. 3.
    Click on the hamburger icon on the right-hand side of the screen.
  4. 4.
    Click on New Configuration at the top of the drop-down list.
  5. 5.
    Enter a name for your new keystroke marker configuration and click on Create.
  6. 6.
    Your new configuration will appear in the keystroke marker configuration drop-down list.

Selecting a keystroke marker configuration

To select a keystroke marker configuration:
  1. 1.
    Click on the keystroke marker configuration drop-down list
  2. 2.
    Then click on the keystroke marker configuration you need.

Renaming a keystroke marker configuration

To rename a keystroke marker configuration:
  1. 1.
    Go to the keystroke marker configuration drop-down list and click on the keystroke marker configuration you want to rename.
  2. 2.
    Click on the burger icon to the right-hand side of the list and click on Rename.
  3. 3.
    Enter a name for your new keystroke marker configuration and click on Rename.
  4. 4.
    The new name will appear in the drop-down list.

Deleting a keystroke marker configuration

  1. 1.
    Go to the keystroke marker configuration drop-down list and click on the keystroke marker configuration you want to delete.
  2. 2.
    Click on the burger icon to the right-hand side of the list and click on Delete.
  3. 3.
    A pop-up box will appear on screen asking you if you want to delete the keystroke marker configuration. Click on Yes, delete!
  4. 4.
    The keystroke marker configuration is now deleted.

How to open the keystroke marker configuration legend

The keystroke marker configuration legend can remind you of the keystrokes you need during an EEG data recording session. The legend opens in a separate window and can be placed anywhere on the screen.
To open the keystroke marker configuration legend:
  1. 1.
    Go to the keystroke marker configuration drop-down list and click on the keystroke marker configuration you want to see.
  2. 2.
    Click on the burger icon to the right-hand side of the list and click on Show Legend.
  3. 3.
    Once open, you can place the legend anywhere on the screen.

How to add markers to your EEG data stream while recording

There are two ways you can add event markers to an EEG data stream recording:
Typing the number associated with the event To add markers to your EEG data stream while recording, type the number associated with the marker on your keyboard at the time of the event. When you type the number, a vertical pink line will appear in the data stream.
Adding a marker with a mouse click To add a marker to an EEG data stream recording with a mouse click, you need to:
  1. 1.
    Open the keystroke marker configuration legend (to do this, see How to open the keystroke marker configuration legend).
  2. 2.
    Place the legend in a suitable place on the screen.
  3. 3.
    Each time you need to mark an event in an EEG data stream, click on the appropriate keystroke marker in the legend. You’ll then see a pink vertical line appear in the data stream to mark the event.
You can add markers to Raw EEG, Performance Metrics, and Motion views, so you can easily see the event when you review the recorded EEG data.
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