rsTouch requires a CoreMIDI compatible iOS USB MIDI interface. However some iOS USB MIDI interfaces have issues handling MIDI SYSEX data. The "language" that rsTouch uses to converse with Reason makes extensive use of short-length SYSEX messages that are sent to and from the iPad. Under fully loaded conditions, such as when a song is being played, quite a number of these messages are sent from Reason to rsTouch. This can stress an iOS MIDI interface with weak SYSEX handling to the point of failure.
A few iPad MIDI interfaces have reportedly suffered from overall SYSEX compatibility issues. This has been reported as an issue by owners of the Alesis IO Dock (see Alesis 10 Dock SYSEX compatibility
). We have not tested the IO Dock so we cannot confirm this alleged problem. If you are considering an IO Dock we recommend you contact Alesis directly to determine what the current status is. In general we recommend confirming full MIDI support for any iOS MIDI interface by testing it with the apps you wish to use before investing in it.