YouTuber Mike Homan shows us how he is able to get MIDI Polyphonic Expression (MPE) with his TEC Breath Controller and a WARBL! I'm not sure how he is physically fitting both into his mouth at the same time, but I admire his determination.
Using a TEC Breath controller for subtle vibrato and the WARBL in bag mode to simulate to get all the MPE control in the Noise app on my ipad. Both controllers are used simultaneously and connected via usb but can also use a PUC+ for wireless MIDI via Bluetooth LE . Used Midi flow to filter the pitch bend and to join the two breath controller midi to one output. Noise app allows for MPE control