I am in the process of building a device (the "SynLimb") that attaches to my arm prosthesis instead of the prosthetic hand. The SynLimb converts the electrode signals that my prosthesis picks up from my residual limb into control voltages (CV) for controlling my modular synthesizer. The SynLimb thus allows me to plug my prosthesis directly into my snythesizer so that I can control its parameters with the signals from my body that normally control the hand. For me, this feels like controlling the synth with my thoughts. I show the prototype(s), explain how we put it together and how it works, and do a little demo.