func (s *SampleInstance) SetGain(val float32) bool { return bool(C.al_set_sample_instance_gain((*C.ALLEGRO_SAMPLE_INSTANCE)(unsafe.Pointer(s)), C.float(val))) }
// Sets the gain of the sample instance. func (self *SampleInstance) SetGain(val float32) bool { return cb2b(C.al_set_sample_instance_gain(self.handle, C.float(val))) }