Visually evoked potential app for Attys for Windows/Linux

attys-ep performs averaging over repetitive stimuli: visually evoked potentials and P300.

Both the raw data with the trigger and the averaged EP can be saved. Both formats use tab separated values which can be imported by virtually any program, for example python, MATLAB or excel.

Add these two repositories...

sudo add-apt-repository ppa:berndporr/attys
sudo add-apt-repository ppa:berndporr/dsp

...and then select attys-ep in your favourite package manager. This will then install also the other required packages.

You need the following libraries to compile and run the program:

• attys-comm (https://github.com/glasgowneuro/attys-comm): apt-get install attyscomm-dev

• Qt5 / Qwt standard UBUNTU packages: apt-get install qt5-default libqwt-headers libqwt-qt5-dev

• IIR filter library (https://github.com/berndporr/iir1): apt-get install iir1-dev

• Linux: qmake, make

Install the MSI file (not signed): https://github.com/glasgowneuro/attys-ep/tree/master/installer/Release

Install:

• attys-comm: https://github.com/glasgowneuro/attys-comm
• Qwt for QT5: https://sourceforge.net/projects/qwt/files/qwt/6.1.3/ (compile it in the VS64bit console)
• IIR filter library: https://github.com/berndporr/iir1

Edit attys-ep.pro and point it to attys-comm, qwt-6.1.3 and the iir library

Run qmake -tp vc and compile the solution with Visual Studio 2022.

Just type: attys-ep or ./attys-ep

Every row contains two columns:

time (ms)      evoked potential (volt)

See example_vep.tsv for an example of a visually evoked potential.

Every row contains three columns:

unfiltered channel 1 (volt)      unfiltered channel 2 (volt)      trigger

the sampling rate is 500Hz for the Attys2 and 250Hz for the Attys1.

In the python directory is the script calc_ep.py which calculates the evoked potential from the raw data.

attys-ep is based in part on the work of the Qwt project (http://qwt.sf.net).