Posts by piotrmaj

    Limit the traffic to meaningful comands in meaningful timing. Avoid dumping MIDI while you rewind your project.

    This! In many DAWs this is called MIDI Chase and you can select which events are "re-played" when you move the playhead. Disable everything you don't need and set the track that will be sending MIDI to KPA in such a way that it won't accept any additional MIDI messages (because they would be forwarded to KPA). Once traffic to KPA is minimized it works perfectly every single time.

    One day I could not get any feedback from Toaster + Kabinet. I put 2 x Kemper Drives, full blast, stood 5 cm from speaker turned to 11 and... nothing. My band made was able to get beautiful feedback from his amp. And I could not get any. It was driving me nuts. Finally, I realized that the song required D-standard tuning. My band mate uses 7-string guitars and just used his B string, whereas I was using 6-string guitar tuned to E-standard with transpose -2... 8o

    I guess even Profiler cannot bend laws of physics :)

    I played last gig on Player with one base performance and only 2 slots used:

    1) First button - clean
    2) First button morphed - crunch
    3) Second button - distortion
    4) Second button morphed - distortion solo

    Third button - tap tempo + tuner

    1+2 buttons together - bank down
    2+3 buttons together - bank up

    When I press bank up I switch to the same rigs but transposed -1.
    Next bank is the same rig transposed -2
    next -3
    and yet another bank -4

    Our bass play uses very similar setup.

    Are you suggesting that Kemper profiling works on a model based design where the "profiling process" simply uses closed loop feedback to tweak the parameters in the model?

    if you read details of patent https://patentimages.storage.googleapis.com/f8/0f/6b/2c0d4…e/US8796530.pdf - yes. It is not an easy read and I don't claim I fully get it, but there is a reference model, and characteristic model with a few unknowns, which are "learned" during profiling.

    Update after analyzing this patent with Gemini AI:

    The hardest part is to model non-linearities. And Profile appears to be utilizing a trick where non linear system can be approximated by:

    1) frequency response before non-reality A
    2) non-linearity itself (patent describes it only in term of properties. Gemini deciphered them for me as just tanh function)
    3) frequency response after non-reality B

    system is continuously comparing reference signal with signal synthesized by characteristic model and parameters are adjusted. A and B are adjusted together and in reverse manner. If some frequencies are made more prominent in B they are attenuated in A to maintain balance which matches the original signal. This continues until no further improvement can be made.

    I stil don't get exact math how it's done (and to be honest to care that much) but with a bit help of AI everyone should be able to get very good intuition about Profiler internals.

    Guys, I suggest to stop at this point. The Final Experiment was a flop, too.

    OneEng1 It is extremely disrespectful of you to demand any additional information from Damian, when it is clear that you failed to read original message at all. Damian gave you complete information which allows you to reproduce the results yourself, but you refuses. Just like a few posts ago you criticized video I posted admitting at the same time that you actually didn't watch it entirely. If you don't know to how to setup KPA for this experiment you should revisit Main Manual. Start at page 1. I will give you only one hint: it needs to be on (chicken knob to browse position).

    This community has always been very respectful for anyone and it is one of its differentiating factors but pseudo-science non-sense needs to be called out and stopped - even if it comes from old community member (we have too many pseudo-science issues in this world already).

    I invite Cliff Chase to explain how Kemper is creating Aliasing. I also invite anyone to provide some proof that Kemper has aliasing. Note: I am not saying that the evidence can't be found. I am saying no one has done it.

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    Regardless, since the DSP chip has remained the same, there is no reason that an MK1 can't do it right?

    It might be able to or not - we don't know - (maybe part of DSP pipeline is happening on CPU and older chip just can't handle it). But in any case it is not our decision. We can speculate all days long - but it's a bit counterproductive. Let's wait and be delighted.

    As I've been reading about it, apparently this new profiling is made in the computer because the computer is more accurate, the best captures around are made in the computer (NAM, TONEX). And I hope they give the possibility to use your own audio interface preamps, because there are some great preamps out there.

    NAM and Tonex are using Neural Networks which is completely different technic and it is extremely compute-intensive process (read: required good GPU to achieve in reasonable time). As a result you might get a perfect capture but it is black-box and not a tweak-able model. KPA profiles are tweak-able models and personally I don't think that Kemper will go down NAM / Tonex route - what Kemper offers is much better and more flexible (even if it is less accurate - this matters only in lab). Like you all I also can't wait to hear and experience new profiles but I don't think they will be much better than current ones (which for me are pretty much perfect for all practical applications) - my expectations are moderate.

    Note: If profiling is currently being performed on the application processor (vs the DSP) and it REMAINS there, then it is completely reasonable that only MK2 could MAKE profiles with the new algo as the new application processor is about 4x faster than the old one.

    We don't know jack about how profiling internally works but I think it is not unreasonable to assume that it needs to be done with DSP chip at least for refining stage where two signals are compared to minimize error (you need to "play" profile to have something to compare with reference).

    It is LIKELY that the actual "new profiling" will be done on the PC (which I think is a great idea btw)

    I don't think so - they never mentioned it - it will be driven from computer because Player has no good UI to do it directly on the unit.

    Moving profiling and DSP in general to computer would make sense to me only in one case: if they planned to release VST / AU plugin - which would be awesome but probably never gonna happen.

    I don’t want to find out their is not a significant difference and not be able to return it.

    If new algorithm is the deciding reason to buy new hardware you should probably wait and try it out before you buy. I personally don't expect new algo to change much. Yes, it might be more accurate at profiling but it only matters during A/B comparisons and null-testing and doesn't translate much to "real world". The whole profiling / capturing thing is at this point in diminishing returns territory, so I wouldn't count on day and night change. I'll happy to be proven wrong, though.

    Ok, fanboys...

    I feel summoned :)

    Lots of anger, very little substance. What specifically are you missing in MK 2?

    Kemper has its UI and workflow and it is exactly what people value. It is perfect live machine. Sounds and feels great. Design used successfully for over 12 years by pros all over the world. MK 2 is incremental upgrade clearly not focused on hardware as it is near perfect and sufficient for most people. It looks like hardware is updated to enable more software updates in the future.

    Built in stem splitter for practicing is great. I would probably still use Logic Pro for its Varispeed, but that is very cool feature which right now requires external software / services.

    Timeline with events looks great as well but I don't think it would be a practical replacement for Gig Performer or other show manager software.

    Overall very impressive product - however I'm totally surprised that it is modeling device first. Releasing new modeling engine in 2025 seems like a giant waste of effort.