PXB 11 Spirit Box, dual sweep ITC research ghost box and EVP recorder, that scans both forward and reversed audio banks, plus multi-layers of white noise and radio frequencies, to capture real time EVP and produce most effective results, almost instantly ! PXB 11 Spirit box is designed based on two main audio banks of forward and reversed speech recorded from different sources. When the software is activated, the two banks are randomly cut to small clips and mixed, to generate human-like audio