Bound Media Items are Media Items that are bound to another Media Item such that whenever the main Media Item is scheduled in the Log (or dragged into the Log) the Media Item that is bound to is will also be added to the Log either before or after the main item.
You will find the Bound Media Item option on the Other Tab on Edit Window for Songs, Links and Adverts.
In the example above, whenever the Kylie song is schedule to play in the Log or manually dragged into the Log, the ‘UK Hot 10 Promo 2’ Media Item will be added to the Log before the Song. You can use the drop down option to select whether the Bound Item schedules before or after the item it is bound to.
If the item being bound is also marked as a sweeper, it will use the standard sweeping settings for that item so in this example, if the UK Hot 10 Promo was replaced with a short recording of Kylie wishing the listeners well which was also set to be played as a sweeper, the recording would be swept into the Intro of the Song creating what is commonly known as a Power Intro.