3dscapture.com

As the title suggests, I want to capture the game sound effects but disable the game music, something similar to what is done here by Shady Penguin: https://www.youtube.com/watch?v=9c0-CsKBk5Y

I'm of the impression that this can be achieved with a 2 channel (using Red and white cables) into your PC from the noise filter? This would make sense for at least Pokemon I would presume - the sound effects are on one channel and the music is on the other?

At present I just use USB audio, but also have a ground loop isolator that is one connection to my sound card as opposed to two separate connections.

If someone could confirm this for me, would be appreciated

That has nothing to do with any external hardware. It'll be possible on a game-by-game basis and you'll have to do something like turn off the music in a settings section of the menu.