Michael C.
Is anyone here using a TEC breath controller with Sonar? I have one and no matter how a set the settings I find it REALLY hard to blow.
I have it and I find it quite sensitive, nothing like the problem you mentioned. Maybe try reducing the "Sensor Max" setting. Do not reduce "MIDI Max", this will not help.
Also try monitoring the actual MIDI CC values coming out. On Windows you can use the MidiOX. On Mac OS you can use Snoize Midi Monitor. If it gets to 127 (the maximum midi value) you have a problem somewhere else, not in the breath controller.