Trill of techniques


Mirroring the ordinary trill, where two pitches are alternating, I would like to see implemented a trill of techniques. The trill would alternate between two different playing/playback techniques, for example the closed and open wah mute, or the normal and the harmonics playback.

This is an example taken from a rather recent score, where open and close plunger mute are alternating rapidly, as in a trill (sorry for the low quality of the draft, made while standing, on an uneven surface and the wrong pen):


My idea is that this functions could alternate between two playback techniques, or between two CC values, covering a wide range or modulation possibilities.