High resolution MIDI control data can be sent from one device to another by combining two, standard MIDI continuous control messages - giving 14 bits of resolution (16384 values) as opposed to just 7 (128 values).
The high seven bits are sent first via a MIDI control message using controller 0 - 31. The low seven bits are sent second via a MIDI control message using controller 32 - 63. Thus, each channel can send up to 32 different pairs of high resolution.
To receive this data using a Teensy and the relevant USB MIDI functions, it's simply a matter of reversing this process to reconstruct the data values.
In this example, a two-dimensional array holds the high byte values in preparation for the low values. Values are reconstructed, and then printed to the serial port for viewing on the Serial Monitor. A basic Max patch is used to send high resolution MIDI data.
Download here: http://milkcrate.com.au/_other/downloads/arduino/High_Res_MIDI_Receive.ino