Wanted: Digital filter program

[James Tizard]

I am looking for a program that can apply bandpass and/or notch filters
to time series data. It doesn't have to bee too flash. Any language,
any data format will be fine. Replys by email would be appreciated

TIA

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 _--_|\        James Tizard                             
/      \       Cognitive Psychology Laboratory
\_.-*._/       Psychology Department                    
      v        Flinders University of South Australia   
               psjmt at cc.flinders.edu.au