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"PolyRex was originally developed for the sole purpose of down-converting the 24-bit BioSemi data format (BDF) used by BioSemi's ActiveTwo EEG/ERP recording system to the 16-bit continous data format (CNT) used by NeuroScan (version 3.x) with minimal loss in data resolution. Although a converter program had been distributed by BioSemi under subcontract, its conversion results did not fully meet our data collection and analysis needs, which originate from a thorough understanding and exploitation of NeuoScan's 3.x data format. It was easier for us to write our own software than to request and explain the needed modifications for an effective integration of ActiveTwo data recordings into our existing data processing and analysis procedures."