Best scenario for display real time frequency interval

[alter]

Hello All,

1. In the hypotheses that the input signal is given from gdf reader (the signal was captured and saved in gdf format) the problems is to display the specific interval of frequency eg. 7-12 Hz.
What is the best scenario for observing in real time this interval?
The observation will be in time frequency map but if there is another way please name it.

2. Second, is there a way to introduce a slow function or command in order to have a delay (eg. 200 ms instead of 1000ms) while playing the scenario?
(I need to play the scenario a bit slower)

Thank you.

[alter]

Nobody?

[jtlindgren]

You could bandpass filter the signal using temporal filter and then square it. This gives you kind of band power estimate that you can give to signal display. Also look at the fft scenarios.

I'm not quite sure what you want to do with the delay. If you want ti delay stimulations, you could use Lua box with a script that modifies the timestqmps. See lua scripts bundled with openvibe eg under bci-examples/

Happy Hacking,
Jussi