Display MoreJust wanted to give my two cents' regarding this ....
1) Preset switching lag. It was one thing that made some poeople prefer the Axe FX for live use
--> I don't have any issues with preset switching lag with the FCB1010 UNO4Kemper installed. And that solution is much cheaper than Fractal's pedalboard
2) Booting time - axe fx in few seconds, Kemper nearly a minute (at least 30s was it?). Not a problem in studio or at the rehearsal, but when the electric shuts down for brief moment and then the gig must continue as soon as possible - 30s is killingly long time.
--> I have 400+ profiles and the latest FW boots in 35s. If you're gonna use it for live use, maybe you'd have less than 20 profiles on there so boot time would be even faster. How often does this really happen? If you play in clubs where this happens all the time, I'd be more worried about frying my gear -- so get a UPC as suggested earlier. You'd want to do this regardless of whether you have a Kemper or Axe-FX.
3) Two amps at the same time
--> This sounds like a great thing to have, but practically, you almost never see this live. You might see multiple amps on stage (like Eric Johnson does), but he NEVER runs them at the same time. It's almost never done.
4) Ultra Resolution cabinet IR's alternative
--> This is marketing. The Ultra-res IRs allow Fractal to get longer tail IRs with less compute power. But there's a caveat. They are proprietary, and as confirmed by Jay Mitchell on the Fractal forums: "The data in an "Ultrares" IR contains less information than the original IR from which it was derived.....To produce an Ultrares IR, the tail beyond approximately 20ms is decimated: lowpass filtered, then downsampled. Based on the frequency content of this tail - it cuts off very sharply at 2500 Hz - the decimation ratio is 8:1. IOW, the sampling rate used by the algorithm that processes the tail is 6kHz rather than the system rate of 48kHz. The demand on CPU goes down approximately as the square of the decimation ratio. This process has been in use for decades, for exactly this purpose (reducing cpu demand). "
In essence, the Ultra res IR contains information about the room -- not extra info on the cab -- which is in the first 20ms. And even the room info has been compromised. A suitable algorithmic reverb and delay can easily make up for this, as anyone who has used a TC or Lexicon reverb can attest vs a convolution reverb.
5) Tone Matching alternative for getting the exact sound from record or whatever.
--> This technique is not new. It is EQ matching of two audio signals. For best results, it assumes you have the IR of the cabinet used, and an amp model in FW that matches well. There definitely is a lot of tweaking and experimentation needed here to achieve a match. For an existing amp/cab, Kemper's profiling method seems to be the more accurate method. For matching an existing recording, the Axe-FX may get you there faster -- but with tens or thousands of profiles, it isn't hard to find matched profiles as can be seen in the Rig Exchange or in commercial profiles.
Wow,
thank you very much for great response! Much appreciated 
