The final track on the tape , '' OK Computer Program '' , comprises two minutes of computer tones ; filtered through a low - pass filter and run through a ZX Spectrum home computer , a short computer program loads .
The final track on the tape , '' OK Computer Program '' , comprises a '' mysterious two - minute blast of squeaking , squawking computer tones '' . 
 When the tones are filtered through a low - pass filter and run through a ZX Spectrum home computer , a short computer program loads .