I'm actually thinking of doing 5.1 upmixes from available audio sources for certain of my projects, which in my opinion would be better than simply upmixing from a 2-channel source if possible. Among the first projects on which I'll be doing this is Sailor Moon R: The Promise of the Rose. It helps that the Sailor Moon Memorial Music Box collection was released in a nature that allows for easy reconstruction of the music track–and not just that, they also included original sound effects from the franchise in that collection! I just wish other franchises, live-action or animated, would treat their audio elements in a similar manner...
In any case, if these 5.1 upmixes sound good enough, I might take it to the next level and do 7.1 upmixes using the exact same method.
In any case, if these 5.1 upmixes sound good enough, I might take it to the next level and do 7.1 upmixes using the exact same method.