<real key="fade_time" name="fade_time">fade-in time</real>
<real key="fade_rate" name="fade_rate">fade-out time</real>
<real key="lifetime" name="lifetime">when set, the music created by this target is switched back to the default one when this time expires</real>
<real key="fade_time" name="fade_time">fade-in time</real>
<real key="fade_rate" name="fade_rate">fade-out time</real>
<real key="lifetime" name="lifetime">when set, the music created by this target is switched back to the default one when this time expires</real>