Thanks evilJazz . Thanks to your advice , now we can control volume in Quasar. (though it is limited .) [EDIT1] In Maemo , we can control system volume through Gconf. I'm trying hard to build it into Quasar ... [EDIT2] Because of my low abilities (I only can type "configure","make" and "make install."), some people misunderstood Quasar as if it was so buggy. I'm sorry for it...