There is this phenomenon where the beginnings of phenomena are clear in the A&P, but the endings of not experienced, and the beginnings of phenomena are hidden in the dark night, and the endings are clear.
I've experienced this most clearly with mantra-based vipassana jhana (described in MCT

I was wondering if it might not be possible to design a soundscape where there was a message or melody hidden in the beginnings or endings of small composite sounds, such that it would be hidden in either the A&P or the DN.
Ideally, there would be things hidden in both the beginnings and endings in such a way that noticing both clearly (equanimity) would result in a third melody or message.
So, for example, if you were in the DN and heard this sound, you would not hear what was hidden in the beginnings of sounds, but would hear what was hidden in the endings of sounds.
I have no idea if this is possibly, and it would probably take a good sound technician, an experienced vipassana meditator and preferably someone who knows how to design experiments of this sort to scientific standards.
Does this sound feasible? Any ideas on how to actually do this or related experiments? Has this already been tried?