This paper presents a framework for the estimation of the faders gain of a mixing console, in the context of broadcast radio production. The retrieval of the console state is generally only possible through a human-machine interface and does not permit the automatic processing of such information. A simple algorithm is provided to estimate the faders position from the different inputs and the output signal of the console. This method also allows the extraction of an additional unknown input, present in the mix output. An exhaustive study on the optimal parameter setting is then detailed, that shows good results on the estimation.