Do you casually happen to have files produced by ANT Neuro hardware? The files have .cnt extension, and are in EEProbe/CNT format (not to be confused with Neuroscan .cnt format). The files are large, e.g. containing data samples at 1000 Hz frequency or similar.
ANT Neuro does have a C library to read them: LIBEEP (sourceforge and ANT website).
So here's a little tool that:
- Reads all .cnt files in the current folder,
- Ignores samples from beginning and end of the file that "seem invalid" (invalid samples are deemed the ones where channel unit is
%and value is outside of 0..100 range, or in general where any value is outside -million..+million range). - For the rest of the samples (i.e. valid ones), averages their values over each minute.
- Outputs channel titles and the "average over each minute" channel values as a CSV file, with the same name as input CNT file, just extension changed to
.csv
That's it!
I only checked the build on Windows (Visual Studio 2022) and Mac (clang 14). In theory any C++17 compiler should do.
The embedded libeep-3.3.177 source is from the SourceForge page above. License of that is GPLv3, and the original authors are: Max-Planck Institute of Cognitive Neuroscience, Germany; ANT Software BV, The Netherlands; eemagine Medical Imaging Solutions GmbH, Germany; Radboud University, Nijmegen, The Netherlands; Philipps-Universität Marburg, Germany.