MIDI Solutions BC3A Breath Controller & MIDI Converter Bundle The MIDI Solutions Breath Controller is a breath to MIDI converter for use with the Yamaha BC3A Breath Controller (TM). The Breath Controller accepts the BC3A as input and generates MIDI data corresponding to the amount of breath pressure applied to the device. MIDI Solutions Breath Controller can be programmed to send most types of continuous MIDI messages, including Aftertouch, Pitch Bend, Control Change. Another feature of the Breath Controller is its ability to add a variable amount of curvature in its response to the applied pressure of the BC3A. The Breath Controller is programmed by sending it MIDI System Exclusive messages. Once programmed, settings are retained even after power is removed. This allows you to correct for nonlinear responses, or to add greater response at one end of the breath range compared to the other.