Effect instances in Wwise fall into two categories:
Custom effect instances that are applied to a single object only. When you change the properties of a custom instance, only this object is affected.
ShareSets that can be applied to many objects. When you change the properties of a ShareSet, all the objects using that ShareSet are affected.
By default, all effect instances you create begin as ShareSets. However, you might want to tweak a ShareSet for only one object. To do this, you can convert the Effect ShareSet into a custom effect instance. For example, let's say you've created a ShareSet called Funky_Reverb, but you want a special variant of that ShareSet just for a sound called Speech_1. You can apply Funky_Reverb to Speech_1, convert it to a custom instance, and then make your changes. The changes you make will apply only to Speech_1, and not to the objects that subscribe to the Funky_Reverb ShareSet.
To convert a ShareSet into a custom instance:
Load an object which has the Effect applied to it into the Property Editor.
Switch to the Effects tab.
In the Effects table, select Define custom from the Mode list for the Effect that you want to convert to a custom instance.
The name of the Effect instance has the word “Custom” appended to it. From now on, changes you make to the instance will only affect the one object that uses it.
![[Note]](/images/2022.1.17_8543/?source=Help&id=note.png)
Note You can also create a custom effect instance by applying the Default (Custom) version of a ShareSet to an object. The original ShareSet still exists, and remains unchanged for any subscribed objects.
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