With the introduction of iPhone 7, more and more customers are asking us why Positive Grid's iOS apps don’t support Bluetooth audio devices. The untold fact is the latency that exists in Bluetooth protocol is unacceptable for any serious music playing, thus we can't develop for devices that rely on Bluetooth audio transmission. For all iPhone 7 users, we suggest using Lightning audio devices with standard input/output like PreSonus, IK Multimedia or Line 6's solutions.
Thanks for your understanding.
Positive Grid Team