This question is inspired by comments to this related question:
I would be surprised unless you could find a mobile app or at least some Apple/PC SW that filters out a given instrument from the orchestra sound.
Is this possible at all?
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No it is not possible given the current state of art. Therefore recording engineers distribute microphones to have separate tracks for the instruments or instrument groups (so they can change the balance) and therefore special recordings as music minus one are required with filtered soloist voice to produce training material with full tutti voices and nothing else.
Artifical Intelligence may provide that possibility in the future, but I would not hold breath.
Note that splitting to all components is even more difficult, than to extract one instrument.
No, at the present state-of-the-art, 'un-baking the cake' isn't practically achievable except in special cases like a stereo recording with ONLY one instrument being panned centre etc.
However, I would be very surprised if the military aren't interested in software that can isolate one voice from a babble. If that is successful, stand by for a spin-off.