If you've used the Aggregator to combine multiple Captivate published SWFs into one TOC (via File > New > Aggregator Project), you might have come across the following scenario (specifically in the FireFox browser):
Lesson A is first in the list so it plays first.
Lesson A is just about to end and next up is Lesson B. Lesson B has background audio.
Just before Lesson A finishes… what was that??? The background audio from Lesson B began to play even though Lesson A hadn't quite finished. It was just a bit of an audio bleed so maybe you were hearing things. You play the aggregated lesson again and, sure enough, there was just a bit of audio bleeding from Lesson B.
The problem with the audio bleed is due to a feature in Captivate 4 called "Auto Play." If your lessons were standalone lessons posted on your Web server or LMS, you'd probably want them to "Auto Play" once the lesson begins. Of course, if you disable "Auto Play," how will the lessons in the Aggregator list play at all? Good question. In reality, Aggregator was designed with an implied "Auto Play" option enabled for every lesson in the Aggregator list. However, if you don't disable the "Auto Play" feature for all of the lessons in the Aggregator list except the first lesson, the audio from the lessons may bleed as mentioned above. (I say may because, as I understand it, the issue doesn't always make an appearance and is most widely reported in FireFox).
Here is how you disable the "Auto Play" preference for the individual Aggregator lessons:
- Prior to publishing each of the lessons you intend to include in the Aggregator project (except for the first lesson), choose Edit > Preferences.
- Select Start and End from the Project category.
- Deselect Auto Play from the Project start options area of the dialog box and then click OK.

- Publish each project as a Flash SWF and then add it to the Aggregator project.
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