/* call-seq: * volume = new_volume * * Sets the volume level of the music. * 0.0 is total silence, 1.0 is maximum volume. */ VALUE rbgm_mixmusic_setvolume(VALUE self, VALUE volumev) { double volume = NUM2DBL(volumev); Mix_VolumeMusic( (int)(volume * MIX_MAX_VOLUME) ); return volumev; }