How to record Neurosky signals without repeating @ 512 times

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hatma
Posts: 12
Joined: Wed May 08, 2013 11:10 pm

How to record Neurosky signals without repeating @ 512 times

Post by hatma »

Dear all..

I have succeed to record all signals from Neurosky (raw data, alpha beta, etc) using Openvibe into csv file.

However, when I open the csv file it seems that all signals, other than the raw electrode signal, are being written 512 times repeatedly the same values.

I guess it is because the sampling rate of Neurosky is 512, while the eSense signal (alpha/beta/attention/meditation/etc) are being update per second.

my question is, How to record Neurosky eSense signals without repeating @ 512 times ?

Or how to record values per second (despite the sampling rate is fixed 512)?


best regards
hatma

jtlindgren
Posts: 775
Joined: Tue Dec 04, 2012 3:53 pm
Location: INRIA Rennes, FRANCE

Re: How to record Neurosky signals without repeating @ 512 t

Post by jtlindgren »

Just guessing here, but would you be able to process the sample with the Signal Decimation box? I haven't tested it, but by description it looks like it does downsampling.


Cheers,
Jussi

hatma
Posts: 12
Joined: Wed May 08, 2013 11:10 pm

Re: How to record Neurosky signals without repeating @ 512 t

Post by hatma »

Dear jlindgren

thanks a lot

I will try to use the Signal Decimation box, with decimation factor = 512 (to reduce sampling rate 512 into per second)

best regards
hatma

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