"Instrvolume actions allow you to adjust the relative volumes of instruments over the course of a song. Place the instrvolume event at the desired location. A drop down list at the target field allows you to specify the instrument target. Here (at last), you get to use the value field. A decimal figure above 1 will make the instrument relatively louder. A decimal figure below 1 will make the instrument relatively softer. Thus a instrvolume with a flute target and a value of 1.20 will make the flute 20% louder, while a value of 0.80 will make the flute 20% softer."