Made from the uncompressed 7.1 mix found on BluRay. It's not perfect, as there's some light vocal bleeding through on some of some songs. Also, I skipped a few, below is a list of the songs I included:

The Sound of Music
Overture
Maria
I Have Confidence
16 Going on 17
My Favorite Things
DoReMi
Lonely Goatherd
So Long, Farewell
Entr'acte
Climb Ev'ry Mountain
End

Link to an older version I tried with different channels:
   • The Sound of Music: Instrumental Trac...