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PostPosted: Mon Jun 11, 2018 9:03 am 

Joined: Wed May 02, 2018 4:19 am
Posts: 3
Dear All,

I am designing a neurofeedback scenario for Alpha up training while playing some music in the background. I am using Emotiv Epoc+ headset for the raw signal. I have a couple of questions regarding the different elements of the OpenVibe designer.

I can correctly extract the alpha band and compute the alpha power using the signal display element. I want to show/visualize the alpha band power as vertical bars to the participants. Can you help me which element to use for this purpose? I added "Level measure" element from the visualization>basic box (see the screenshot attached), but it gives me the bar with respect to each electrode. I want only one bar to show mean alpha power across all electrodes. how can I do that?

Another question is that I want to control the volume of the background music using a threshold value from the alpha power. this means when the alpha power reaches a lower limit the volume of the music goes down and if the alpha power reaches to upper limit the volume increases. Is there a threshold element for this purpose?

I can see from the example scenarios, there is a spaceship example. is it possible to control the speed of the spaceship using the alpha power? for example, the speed of the spaceship increases gradually with an increase in alpha power and vice verca, and visualize it as feedback stimulation game to the participant.

I hope to get your help. Thank you


File comment: Screenshot of the designer window
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