What (preferably free) music software fits my purpose of downloading transcribed orchestral pieces and listening by instruments?

Question

I'm seeking music software for Windows 10:

1. for whose format the most orchestral pieces have been transcribed. I lack the time to notate or input notes myself. But most software's scanning accuracy, like Photoscore, are flawed:

I use and love Musescore, but I have never had any luck with the pdf import feature. I've even tried importing a pdf that was made by Musescore, and it didn't come close.

Finale's recognition feature doesn't work really well

2. that then allows to decompose the score and hear only some instrument(s).

E.g., I fancy downloading the score of some Xenakis piece and then listening to only what is played by instrument(s) that I choose.