Removing snare and or bass?

hmm…. good luck, It will be very difficult if not impossible to get rid of the snare. Im not familiar with a.a.1.5 but You can try to get rid of the bass by eqing the low frequencies out of the acapella, prob around 80hz would work for most deep bass. Just play around with it

try getting noise reduction profile of a bit with mainly bass (just a short bit. few hundred millisecs) ,, and doing a noise reduction process over the whole thing.. boosting the reduction at the bottom end with the EQ line bit

snare is much harder.. loop a snare underneath the track and run it thu the knockout plugin

that sounds like a good idea, based on the inversion mehod that would work in theory..