func (m *Mixer) SetGain(gain float32) bool { return bool(C.al_set_mixer_gain((*C.ALLEGRO_MIXER)(unsafe.Pointer(m)), C.float(gain))) }
// Sets the gain of the mixer. func (self *Mixer) SetGain(val float32) bool { return cb2b(C.al_set_mixer_gain(self.handle, C.float(val))) }