Unfortunately it appears with the new iPad 6th Gen, along with iPhone 7 and 7+, are both confirmed to have a bug with the Apple OS and certain USB devices such as our Keys IO and Stomp IO. This can result in a degradation of audio quality over a period of usage, usually a few minutes. This does not occur with other new devices such as iPhone 8 and X or iPad Pro.
This information was added to the iRig Stomp I/O Specs page:
http://www.ikmultimedia.com/products/ir ... mpio-specs
*Note for iPhone 7 / 7 Plus / new iPad 9.7 users: IK Multimedia is working with Apple to fix a compatibility problem that can arise with the iRig Stomp I/O on the iPhone 7 / 7 Plus and on the new iPad 9.7 making the audio stream to become unstable during usage. The problem with these devices will be resolved as soon as possible.While there is no current fix at this time. Do note, we have tested the iOS 12 Beta and had multiple users confirm this iOS update resolves this issue. In the meantime, we will be in direct daily communication with Apple. As they have been able to reproduce the bug, a fix from their end should not be far hopefully. We apologize for the inconvenience and thank your for your understanding while we resolve this issue with Apple.