Coming soon from the developer of Audiobus....The Spectacular Sync Engine!!
This looks really interesting.
http://www.synthtopia.com/content/2015/ ... ent-771466
I hope that this might be of interest to the developers here as a possible improvement/solution for the sync issues I have experienced recently.
It is designed to be very easy to work with, and provides precise, jitter-free MIDI clock transmission and robust, error-tolerant MIDI clock reception for your iOS app.