One recording per instrument, with sound. Each starts with the phrase its Hear it button plays, then carries on by hand — and the captions name each MPE dimension as the gesture that produces it happens.
The sound is the instrument itself, captured from the app while it played — not a recording of something else standing in for it.
A finger, then an S Pen giving real velocity and real aftertouch, then the phone doing both from its accelerometer — with modulation worked by hand, the bend by finger and by tilt, and one note bending on its own MPE channel while a chord holds.
A neck and a grid, on one surface, with a sequencer behind both.
Both arrangements: the pad grid and the bass neck, in your own tuning. Velocity, the slide axis and aftertouch by finger, by pen and from the phone; modulation, a fretless bend, tilt to bend and tilt to walk the neck, two fingers where only one moves — and the sequencer writing into a loop while it runs.
The written phrase drawn in the field as it sounds, then one unbroken line by hand, the volume hand, vibrato, the gyro, and the chord pads laid underneath.