## FFT calculations

**EI-Balance** calculations are based on the FFT Algorithm. All FFT calculations are performed
independently in order to insure high performances and accuracy.

Before FFT calculations, **EI-Balance** implements an algorithm to remove DC offset. This process
normalizes the signal removing the mean value from the signal. The resultant signal has a 0 mean value. This
process eliminates inexistent low frequencies from your signal before performing the FFT algorithm.

FFT Accuracy depends on the length of the recorded signal. **EI-Balance** has the posibility to
change the recorded length in order to increase precision. This is mostly used to improve balancings at very low
speed such as 60 to 100 RPM.