att(db);2*f2-f1;pgm:diffdis1
       0
fd=2f2-f1,F1,f2;RF    -1.00000    
complex distortion fourier amplitude
complex f1 amplitude
complex f2 amplitude
a/dgain,a1,a2
     1.00000         6.90000         6.90000    
     4023.44         3945.31         3984.37    
   -1.351856E-03    4.417878E-04
    -1.47918       -5.071560E-02
    -.632547        8.672392E-02
     4179.68         3789.06         3984.37    
   -6.732482E-04    9.428121E-04
    -1.17644        -.949395    
    -.632781        8.736360E-02
     4335.93         3632.81         3984.37    
    9.362740E-05    1.154350E-03
    -.335394        -1.48019    
    -.632452        8.779186E-02
     4492.18         3476.56         3984.37    
    1.162123E-03    6.324858E-04
     .642783        -1.29880    
    -.631901        8.795220E-02
     4648.43         3320.31         3984.37    
    1.244666E-03   -8.504190E-04
     1.17820        -.531227    
    -.630486        8.785474E-02
     4765.62         3203.12         3984.37    
    1.434358E-04   -1.636263E-03
     1.11257        7.266287E-03
    -.629556        8.714473E-02
     4882.81         3085.94         3984.37    
   -8.956247E-04   -1.236437E-03
     .908798         .391376    
    -.629043        8.665192E-02
     5000.00         2968.75         3984.37    
   -1.236195E-03   -3.159083E-04
     .653635         .607220    
    -.628543        8.627456E-02
     5117.18         2851.56         3984.37    
   -1.124742E-03    3.335029E-04
     .403576         .751872    
    -.627732        8.642912E-02
     5234.37         2734.37         3984.37    
   -7.079288E-04    7.057898E-04
     .122784         .834206    
    -.627718        8.639520E-02
     5351.56         2617.19         3984.37    
   -2.774044E-04    9.774331E-04
    -.178305         .820381    
    -.627843        8.632356E-02
     5468.75         2500.00         3984.37    
    1.915869E-04    1.050995E-03
    -.459992         .700491    
    -.628271        8.629513E-02
     5585.93         2382.81         3984.37    
    5.242126E-04    8.119168E-04
    -.682598         .491343    
    -.628296        8.652562E-02
     5703.12         2265.62         3984.37    
    1.021031E-03    5.944385E-04
    -.825346         .218779    
    -.627896        8.698344E-02
     5781.25         2187.50         3984.37    
    1.161412E-03    1.354152E-04
    -.868038        8.088991E-03
    -.627998        8.690631E-02
     5859.37         2109.37         3984.37    
    1.299627E-03   -3.564404E-04
    -.853329        -.211379    
    -.627947        8.680522E-02
     5937.50         2031.25         3984.37    
    1.169946E-03   -6.327301E-04
    -.786495        -.420683    
    -.628215        8.683574E-02
     6015.62         1953.13         3984.37    
    8.211732E-04   -1.253696E-03
    -.677887        -.609007    
    -.628587        8.667815E-02
     6093.75         1875.00         3984.37    
    5.517555E-04   -1.430003E-03
    -.527803        -.784500    
    -.628561        8.717692E-02
     6171.87         1796.88         3984.37    
    1.891016E-04   -1.588400E-03
    -.327369        -.933710    
    -.628606        8.777839E-02
     6250.00         1718.75         3984.37    
   -2.496408E-04   -1.548072E-03
   -7.461637E-02    -1.04130    
    -.629531        8.814085E-02
     6328.12         1640.63         3984.37    
   -4.585711E-04   -1.447419E-03
     .234686        -1.08363    
    -.630701        8.816731E-02
     6406.25         1562.50         3984.37    
   -7.566484E-04   -1.181274E-03
     .581747        -1.01420    
    -.631478        8.825505E-02
     6484.37         1484.38         3984.37    
   -9.662264E-04   -7.467028E-04
     .903872        -.806348    
    -.631660        8.845407E-02
     6562.50         1406.25         3984.37    
   -1.063830E-03   -3.532928E-04
     1.12983        -.485798    
    -.631500        8.885038E-02
     6640.62         1328.13         3984.37    
    9.524082E-04   -1.029493E-03
     1.22932        -.111210    
    -.630141        8.945906E-02
     6718.75         1250.00         3984.37    
   -9.381997E-04    2.665340E-04
     1.20631         .275672    
    -.632131        8.845407E-02
     6796.87         1171.88         3984.37    
   -5.117927E-04    6.779064E-04
     1.05051         .636886    
    -.632403        8.831638E-02
     6875.00         1093.75         3984.37    
   -1.095198E-04    7.852388E-04
     .777653         .911873    
    -.631846        8.862782E-02
     6914.06         1054.69         3984.37    
    2.707340E-05    7.060568E-04
     .612880         1.00217    
    -.631377        8.890057E-02
     6953.12         1015.63         3984.37    
    2.105023E-04    6.999180E-04
     .443118         1.05636    
    -.631356        8.889240E-02
     6992.18         976.562         3984.37    
    3.755465E-04    6.362966E-04
     .278078         1.07990    
    -.631358        8.870339E-02