verbalee wrote:It is definitely an issue with the Roland Fantom itself as I've gotten the irig to work midi in and out with other keyboards.
The first part is nonsense because the second part doesn't mean a thing. I and many thousands of others have hooked up our Fantoms to a multitude of MIDI devices and it just works. If this is not simply user error (ie. a configuration issue on the Roland) I would tend to suspect the iRig rather than the Roland.
I wonder if you have the Roland configured to do MIDI over USB, will it perhaps disable the physical MIDI input (since otherwise it would have to merge the two MIDI input sources) but perhaps still transmit on the MIDI output? Try setting the Fantom to USB Storage mode.
plugging the midi out of the irig into an mpc or other midi interface if you have one and them plugging the midi out/through of that device into the Roland
There's a big difference between connecting the Roland to a midi OUT of a device that has no separate THRU port versus connecting it to a device with a dedicated THRU. A normal THRU port is just some very simple analog electronics that provides a 1:1 duplicate of whatever comes into the IN port, including any timing inaccuracies.
A MIDI OUT that does double duty as a THRU port usually goes through the device's processor and what comes out of the MIDI OUT is a re-constructed MIDI data stream with the timing goverened by the device that is re-transmitting the data.
If there is some issue (eg timing, levels) with the MIDI data coming from the iRig it's possible that the MPC's MIDI input has greater tolerance for that than the Roland. If it knows how to interpret the iRig signal (even if it's ut of spec) it can then re-transmit it with proper timing, levels etc.and the Roland would be able to use this signal.
A dedicated THRU port on the other hand would only correct level issues but not timing issues. A THRU port might still help if iRig is using a non-standard 3.3V MIDI interface rather than the 5V as per the MIDI specs but I can't imagine they'd do something like that.
http://www.youtube.com/watch?v=TXz0UkVBZPQ
TOYZ in 60 seconds (short live video of my progrock band on YouTube)