Method and apparatus for vibration analysis on a machine

In a method for vibration analysis on a machine (2), in particular an axial piston machine (2), one at the at any operating system (62) connected to the engine (2) detected vibration behavior in a current machine state transformed with a transfer function in an oscillating behavior, which corresponds to the to a reference system connected (60) machine (2) in the current machine condition. The transfer function is formed connected as the quotient of a vibration behavior of the reference system (60) machine (2) connected in a machine state and an oscillation behavior of the at another arbitrary operating system (64) machine (2) in the engine starting state to the vibration behavior of the compare reference system (60) connected to the engine (2) in the current state with the vibration behavior of the reference system (60) connected to the engine (2) in the engine starting state. Furthermore, there is provided a device (72) and a computer program for performing the method.