They did this in several papers, for instance in these two: EEG data acquisition system 32 channels based on Raspberry Pi with relative power ratio and brain symmetry index features https://pubs.aip.org/aip/acp/article/2193/1/050003/889261/EEG-data-acquisition-system-32-channels-based-on Development of electroencephalography (EEG) data acquisition system based on FPGA PYNQ https://pubs.aip.org/aip/acp/article-abstract/2092/1/020026/846410/Development-of-electroencephalography-EEG-data The parameter above indicated that the developed system was adequate enough, if …