MIDI Test Box is a new diagnostic MIDI app for iPhone from Dyslexia Software. These can be really handy for trouble shooting MIDI connections, or for figuring out what MIDI some bit of gear is actually sending. Usually you need to use a computer and something like MIDI-Ox, but here is a portable way for getting at the secret world of MIDI.
An essential app for anyone using MIDI wanting to check connectivity and find out what is and what isn't working. Designed to give feedback in real time and requiring little or no setup so that it ready to use when you need to use it.
Ideal for professional musicians, sound engineers and hardware / software developers.
Any gigging keyboard player will find this app invaluable.
Buy MIDI TEST BOX on iTunes: $2.99 (iPhone)
Their website mentions an iPad version in development, which will be a separate app called "MIDI Test Box Logger".
There are no official details on what MIDI interfaces are supported with this iPhone version. Their promo video, embedded below, says, "Works with most MIDI interfaces and all network sessions." For iPhone that pretty much means things like MIDI Mobilizer. It seems to work well over WIFI, as he demonstrates 5 MIDI sources in network session mode.
Yesterday's news of a jailbreak tweak to enable Camera Connection Kits on iPhones is well timed for this app to take advantage of a whole new range of interfaces. Reader Freja posted in the comments that he figured out how to get a couple of different keyboards working, even adding a powered USB hub into the mix.