[Q]App independent volume control

I previously posted this in the Sensation Q&A forum, but lacking any response I thought I'd re-post it here.

I've been searching for a way to control the volume of different apps independent of each other. As in those apps that don't have any in-app specific volume controls. The only thing I've found is that the native android OS doesn't support such a feature, but that information is old. And while I'm inclined to believe that is still the case, making sure never hurt anyone.

While this has bugged me a bit in the past, it's only now that I've started using Google Now that's it's become annoying. I'm occasionally playing a game that has no in-app sound control, and I don't like the music/effects of that game, so I turn the media volume down to mute. But when I then switch to Google Now, the voice is on the same "media" volume control, which in turn makes me miss the spoken answer to my inquiry. I may not play the game in question a month from now, but the issue will surely persist with another app in the future.

Any suggestions?