Board Thread:News and Announcements/@comment-1341744-20150727195333/@comment-1609742-20150809234837

JayDK103 found this post from Duo Volta:

https://www.facebook.com/duovolta/posts/1643690609203251

"As many of you noticed, we won't be performing again on AGT. The show that aired this week was our final performance together. Thanks to everyone for all the support."

Their official site confirms the duo doesn't work together anymore.

http://duovoltatrapeze.com

So, that's really unfortunately. I agree with the guess that Alondra Santos and DADitude! replaced Silvia Silvia (scheduling conflicts) and Duo Volta. Bizarre replacements though. I would have expected Paul Ponce and Duo Vladimir.