Hi! If your question relates to Loopy Pro, you may find a faster answer at one of the other Loopy Pro communities (https://loopypro.com/communities) – this forum has only a small number of active users.
Here's some great info on audio bleedthrough/crosstalk on iOS devices
Useful info if you're considering the iRig or just Apple's headphones.
Over on the Audiobus forum: http://forum.audiob.us/discussion/comment/2984#Comment_2984