harminv parameter setting issue

[ihaveusernam]

I use this software to calculate the frequency of a signal that is superimposed from three sinusoidal signals
y=sin(2*pi*t*12)+sin(2*pi*t*12.1)+sin(2*pi*t*12)
The length of the signal is 5.23s, the sampling interval is 0.01s, and the number of sampling points is 524；
I use the harminv :
harminv -t -0.01 10-15 < input.data
the result is:
frequency:
-12.1882 -12.0181 12.018 12.182
The frequency of 12.1 is missing，I wonder how harminv‘s parameter should be set to calculate these three frequencies

[joeybarreto]

I recommend reducing the frequency range so that you get better resolution, so like 11.9-12.2 instead of 10-15