Abstract: Transferring digital data to a musical signal processor by a method comprising establishing a connection from a musical transducer to the musical signal processor, the musical transducer being of a type that converts a wireless type of signal into an electrical signal; exposing the musical transducer to a wireless data signal comprising the digital data, whereby the wireless data signal is converted into an electrical data signal by the musical transducer; and receiving and decoding the electrical data signal at the musical signal input of the musical signal processor. According to a preferred embodiment of the invention the musical transducer is a guitar pickup, the musical signal processor is a guitar pedal or other guitar signal processor, and the wireless data signal is a magnetic signal established by an electro-dynamic speaker of a smartphone or the like.