1. A pedal steel guitar comprising: a body having a plurality of strings carried thereon; at least one transducer carried by the body and positioned in proximity to the strings, the transducer producing an electronic transducer signal in response to vibration of at least one of the plurality of strings; at least one foot pedal or knee lever carried by the body and being physically disengaged from the plurality of strings; at least one sensor responsive to movement of the at least one foot pedal or knee lever, the sensor producing an electronic sensor signal; a digital signal processor having inputs receptive of the electronic transducer signal and the electronic sensor signal; the digital signal processor being configured and programmed to operate on the electronic transducer signal in the digital domain and to use the electronic sensor signal to manipulate at least one tonal property of the electronic sensor signal; the digital signal processor being further configured to produce an audio output; the digital signal processor being further configured with a programming input and being further programmed to change the manner in which the digital signal processor manipulates the at least one tonal property based on programming information received through the programming input.