huge numbers while getting data from the cyton
i'm working on a bci projcet using the ultracortex markv headset while reading the values coming from cyton and the daisy board i got huge numbers ;( i'm using gui lsl to stream the data with osychopy and lab recorder ); should i rescale this data before preprocessing it and feeding it to the ai model ?
Comments
https://www.google.com/search?q=fbeeg+site:openbci.com
As i'm streaming the data via lsl in the gui ; should i rescale the data sent from the cyton or a dc filter is enough ? as it is raw adc numbers not microvolots ?
Data stream is always in microvolts.
is it normal to have those values while sending from the gui via lsl getting an xdf file(i ve got those values knowing that on the gui a gain*24 is applied and srb2 is on
Channel min/max :
Fp1: -10410.794 .. 17889.309
Fp2: -9606.422 .. 22845.316
F3: -71080.648 .. -24204.615
Fz: 187500.000 .. 187500.000
F4: -73206.453 .. -42476.004
C3: -71803.055 .. -40817.035
Cz: -187500.016 .. 187500.000
C4: -92642.680 .. -58731.645
T7: -63126.535 .. -10019.013
T8: -43702.176 .. 2022.520
P3: -60457.871 .. -3659.361
Pz: -69417.656 .. -28331.127
P4: -87337.586 .. -53981.922
O1: -43063.363 .. -12465.479
Oz: -38240.773 .. -4481.793
O2: -80656.445 .. -45190.109
Did you READ the previous link / search I gave?
https://openbci.com/forum/index.php?p=/discussion/201/large-millivolt-data-values-fbeeg-full-band-eeg
You just need to filter out the DC Offset. Use a high pass or bandpass with a lower limit of .5 Hz.