BREV

One or more channels may be reversed in polarity, or all channel order reversed.

 brev infil iop1 nflip ch1 ch2 ...    
  
 infil:  =name of input file 
 iop1            0=reverse channel order
        or           
                 1=reverse data polarity
 nflip   =number of channels to be polarity reversed
 ch1     =number of channel reverse data polarity  
 ch2     =number of channel reverse data polarity  
 ch3     =number of channel reverse data polarity  
 ... ch_nflip.  NOTE: if nflip=number of channels,   
      then all channels will be reversed in pol.  )
      (no need to input ch1, ch2,....)

Figure 71: BREV: (A) original data, (B) reverse polarity first 2 channels, (C) reverse channel order. Data plotted by offset.