I bought the iRig thinking that it would do what I wanted with the 850. My bad. The iRig people never mention in their marketing hype that it works ONLY with midi ports and NOT with midi USB ports. Grrrrr. I'm going on Amazon to give them a "wonderful" review.
I actually don't blame the iRig people for that. It is pretty clear from the specs (
"3 MIDI ports: IN/OUT/THRU" and that it includes "MIDI 5-pin DIN cables") as well as the pictures (looking at the ones on Amazon) that it is for standard MIDI, not for USB. Companies generally tell you what their products are for, they don't usually tell you what they're not for. ;-)
Each to his/her own opinion, but I do blame the iRig people for not being more clear. You apparently understand midi in-depth. Therefore, their marketing blurbs are clear to you because you already understand those details. However...
Nothing you wrote above precludes the iRig from being used with a standard USB midi port. That they include
"midi 5-pin DIN cables" is fine. And that they do NOT include a standard USB midi cable is a bit frustrating, but I'll fork over the extra money for one of those. That is, IF I could buy one. AFAIK, these cables are NOT available.
Further they do say that the included USB cable can be used to charge the device while in use. Great. So you can connect the USB cable to your DP and charge the iPad while in use. And of course use that cable for midi. Well, uhmm... No. (They conveniently forgot to mention that.)
Finally, I've read several reviews describing the iRig as superior to the other devices. NONE of them mention that the iRig has a major limitation - no connection to USB midi.
I'm not going to write a negative review about the iRig because it's a bad product. I don't know that because I can't use it. I'm writing a negative review about the company not being clear about what the product can NOT do - at least in a notation.
While "let the buyer beware" is a standard concept, the question is when does failure to clearly describe a product's limitations cross the line. Obviously, you think they clearly described their product and they were not making misleading statements. I think the opposite. Of course, I'm the one who forked over money for a product that I can't use. That affects my opinion a bit.