A sonic homogenizing module (100, 200, 300) for use with a biological sample preparation system comprising a gripper module, the sonic homogenizing module (100, 200, 300) comprising: a rod (120, 220, 320) made of a magnetic material; a piezoelectric conductor (130, 230, 330); a driver (140, 240, 340); a sleeve-coupling member (110, 210, 310) having a first portion defining a space (112, 212, 312) for coupling with the gripper module of the biological sample preparation system, and for accommodating the piezoelectric conductor (130, 230, 330) and the driver (140, 240, 340) therein; and a second portion having a conduit (114, 214, 314) for receiving the rod (120, 220, 320) there through; and a sleeve (150, 250, 350) removably fitted on and around an outer surface of the rod (120, 220, 320) extending out of the conduit (114, 214, 314) of the second portion of the sleeve-coupling member (110, 210, 310); wherein the driver (140, 240, 340) is electrically coupled with the piezoelectric conductor (130, 230, 330) and is configured to drive the piezoelectric conductor (130, 230, 330) to generate a sonic vibration; wherein the piezoelectric conductor (130, 230, 330) is not in direct contact with the magnetic rod (120, 220, 320); and wherein, when in use, the sonic vibration generated by the piezoelectric conductor (130, 230, 330) is transmitted through the magnetic rod (120, 220, 320) and the sleeve (150, 250, 350) to reach a content in the biological sample preparation system, thereby producing a mixing and/or stirring effect. a rod (120, 220, 320) made of a magnetic material; a piezoelectric conductor (130, 230, 330); a driver (140, 240, 340); a sleeve-coupling member (110, 210, 310) having a first portion defining a space (112, 212, 312) for coupling with the gripper module of the biological sample preparation system, and for accommodating the piezoelectric conductor (130, 230, 330) and the driver (140, 240, 340) therein; and a second portion having a conduit (114, 214, 314) for receiving the rod (120, 220, 320) there through; and a first portion defining a space (112, 212, 312) for coupling with the gripper module of the biological sample preparation system, and for accommodating the piezoelectric conductor (130, 230, 330) and the driver (140, 240, 340) therein; and a second portion having a conduit (114, 214, 314) for receiving the rod (120, 220, 320) there through; and a sleeve (150, 250, 350) removably fitted on and around an outer surface of the rod (120, 220, 320) extending out of the conduit (114, 214, 314) of the second portion of the sleeve-coupling member (110, 210, 310); wherein the driver (140, 240, 340) is electrically coupled with the piezoelectric conductor (130, 230, 330) and is configured to drive the piezoelectric conductor (130, 230, 330) to generate a sonic vibration; wherein the piezoelectric conductor (130, 230, 330) is not in direct contact with the magnetic rod (120, 220, 320); and wherein, when in use, the sonic vibration generated by the piezoelectric conductor (130, 230, 330) is transmitted through the magnetic rod (120, 220, 320) and the sleeve (150, 250, 350) to reach a content in the biological sample preparation system, thereby producing a mixing and/or stirring effect.