The risk of vibration in machining can be estimated by identification of the transfer functions of the system. Traditionally the transfer functions may be identified through the use of an impact hammer and a force transducer. This technology needs wiring and therefore cannot be easily used in a production environment. Through the use of the sound that is picked up from the running process, the simplified stability diagram of the system can be deduced. Mobile platforms, like phones and pads can be used to record the sound of the process. The computational capability of these devices are now enough to render the possibility to include the theory and modelling into these devices to make it possible to analyze the process in question as it is running and from that give recommendations to modify the process for minimization of the chatter vibrations. The paper outlines the theoretical considerations and strategy employed to make it possible to develop a useful solution for end-users on the shop floor.