WIP - SAB Genesis [with sounds]

Well then I worked on this baby a bit more, I even was lucky enough to meet online and waste a bit of his time to Voice Act for me wooooh! Thank you my friend! It's greatly appreciated!
However I met a difficulty along the way, I don't know how to put the voice and the music in two separate channels so that they don't interfere with each other aka when I want to stop sounds the music shall still play in the background and not stop together with the voice. Because I know a lot of people will skip the voice later and if they do, without the "stop sounds" command, the multiple voice files will overlap and it becomes a mess...
As long as I don't know how to get over it, have this demo instead. (Well I actually have an alternate idea but that will take some time.)

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Made in Flash
Characters & animation © me
Jun's voice ©
Music © www.youtube.com/watch?v=sh-LPT…
Background - found on Google