A Resonant-Column apparatus was modified by replacing the internal generator by an arbitrary function generator. A PC oscilloscope was used to acquire both the input current in coils and the vibration response of the system. Software developed in LabVIEW® controls the equipment, acquires data and then processes the information, computing the shear modulus and damping ratio of soil. This calculation is performed utilizing a curve fitting method involving a complex-value function carried out by a Matlab® script included in the software. Four types of tests can be performed in the program: the conventional test, sine sweep test, random noise test and non-resonance test. Results reveal the advantages of the new automated system; all tests in small-strain regime can be applied consecutively on the same specimen, being possible to obtain additional information of the dynamic properties.