Hi, I've been looking to make nico nico choruses, but I'm pretty new to editing music. One of the biggest problems I've been facing in general is isolating an utaite's vocals from the instrumentals to add to the chorus. Currently I'm using only free software (audacity) but if there are more convenient ways in other software like FL Studio or what not, I would still appreciate any form of information, guide, or tips. My current main method of isolating vocals is taking the off vocal version of the song and matching it up with the utaite's cover (making sure its the same key) and inverting the off vocal/instrumental. The results....well vary a lot, so I'm hoping there are more consistent methods out there.