What if application creates a NULL sink and redirects mp3 to that sink? Would It still complain about Audio?

I'm thinking of something like this, already done that on my Ubuntu installation using pavucontrol, so It should be possible on Maemo using pactl and pacmd (if only I/Someone know how to use them):

Music Player Output --> NULL Output
Phone app Input <-- Monitor of Null Output
Phone app output --> Another NULL Output