The answer might be that the amp simulation is so processor-intensive that there's simply not enough spare room for an IH. Regardless of whatever other MFX do, they do not have the same amp modeling as L6's. The question however is another one. Since when you're not using dual tones half of the processing power is idle, it could be useful if one could use that for such processor-hungry effects. This has been mentioned several times (1 "super-chain" instead of 2), and it surprises me that L6 would think the dual capability would get so much usage as to justify twice the processing power without the ability of using it all up by a single tone. the fact that nothing of the sort came out so far, though, makes me thing that that's the way it is. I am fairly confident that an unused tone 2 processing stack would be more than adequate to implement an IH (or any other effect I might have more use for ). there might be architectural design limitations in play, though.

Well lookee here and scroll down to the third subject

http://line6.com/spidervalvemkii/effects.html#infusion

It's being done somewhere.  Are X3 and Spider that much different?

brue58ski wrote:

 

I'm pretty sure that when that was adressed it was BEFORE this big update.  I don't believe there isn't enough ooomph because of what has just been given in the update   Take the update back and give me an intelligent harmonizer.  Or dump an amp.  Anyone really use the Fender Mini amp sime more than once if at all?

It really has nothing to do with how many amps and effects are available, it has to do with how many processes can run concurrently in the X3 with the processing power and available ram memory.  All of the extra amps and effects are stored in rom memory untill called.

Think of your computer.  You can have dozens, even hundreds of apps installed on the hard drive, but if you try to run too many at once you'll have problems; especially the processor/memory intensive ones.  Let's suppose for a moment that there is enough processor and ram to run an IH on the X3.  You might be able to do that, but not run any other effects at the same time.  There would be a lot of complaints about that one.