Posts by JeffTD

    Flexible routing I'd say is the biggest thing holding the KPA back from competing with the AxeFX and others for versatility - the fact that you can't put a delay or reverb before the amp, let alone anywhere but the "delay" slot, makes for a very bad user experience.


    I feel like this has been asked for 100+ times - @ckemper would you mind commenting on this?

    I've been experiencing this forever and only recently realized after speaking to another KPA owner that it's not normal, or at least not to their experience.


    If I'm jamming in "tuner" mode, as I often do, there are extremely audible/annoying/messy audible subharmonic notes being produced in response to my playing. I know that sounds crazy, but listen to this:


    KPA Tuner Subharmonics


    It only happens on some of the 'stabs' in the above example, but this definitely sounds wrong and I'm worried that those audible tones are occurring underneath my playing but are only detectable when I stop abruptly. This isn't a huge issue, but it makes it impossible for me to track guitars while in "tuner" mode. Since you're tuning between every take in the studio, it would be really handy to just leave it on tuner mode the whole time, but this makes me weary of that.


    Anyone else experiencing this? I'm on the latest firmware but this has been happening for as long as I can remember.

    Great news Christoph, thanks!
    A bit off topic here, many I know including myself actually prefer to use the term hi and low cut, instead of high and low pass.
    "Cut" indicates directly what it does, "pass" makes you think twice (let the highs pass in order to cut the lows).
    http://www.record-producer.com…y-be-low-cut-and-high-cut
    What term do you guys prefer to use?


    I don't understand how the standard terminology doesn't describe exactly what the filters do? A high pass filter allows highs to pass through a filter (ie how much high end is allowed after a certain filter point), and a low pass filter allows the lows to pass through a certain filter (ie how much low end is allowed after a certain filter point).


    Calling a high pass filter a 'low cut' makes sense, but an HPF is more specific; it suggests that frequencies not included in the high pass will be filtered out entirely, whereas the cut implies that they will just be reduced (a low cut to me implies a low shelf or bell with a negative value, not a true filter).


    I realize my low-self was set too high, but that's how high it had to be in order to clear up the sub-low that the HPF is used to remove in the first place with this technique :)


    That's absolutely wonderful news though and solves a huge problem for me in a super elegant way - vielen dank!

    I think you're mistaken on what SPDIF is as a format - SPDIF is a digital interface; it doesn't process audio at all. It's a strictly digital signal, despite having an RCA style jack. Can you explain what you mean by "SPDIF input offers better audio quality"?

    Okay @ckemper, I have some clips for you here.


    01 - Profile without any of the low-suppression EQ I normally do
    02 - Profile + Wah HPF @ 1.4 (boosted "peak" and used a spectrum analyzer to find ~100hz at the peak)
    03 - Profile + studio EQ low shelf @ 100hz, -12db
    04 - Profile + Equality (VST plugin) HPF @ 100hz, 24db/oct


    What this test shows me is that the Wah HPF is totally capable of achieving the results I want, and that the Studio EQ when dialed to drop out the sub-lows I'm trying to get rid of negatively impacts the useful low end of the tone (I'm assuming the rolloff doesn't start exactly at where the knob is set?).


    So this is my conclusion - I can get what I need to out of the Wah HPF/LPF blocks, but I would need to use both the X and MOD slots (the Wah filters aren't available on the Reverb/Delay slots), which means I can't use any post-amp FX other than the Wah filters. This is what I find unacceptable, because this particular profile already has Studio EQ in the X slot, so I can't do both HPF and LPF via the Wah filters here even if I wanted to.


    What would be ideal IMO would be for the Wah filters to be built into an additional page on the Studio EQ; i.e. the Studio EQ would have the existing hi/low shelves and dual mid-band w/Q controls, and then an additional set of controls for frequency/slope for HPF/LPF.


    If that is too big of an ask, would it be possible to combine the two Wah filters into one block with frequency/slope controls for each filter, and have the control scale be in hertz rather than the current Wah filter configuration?


    You seem to know what your talking about, and I apologise it I dont understand, but why are you needing them in the Kemper and why not use it at tracking stage via desk/DAW?


    @and44 I want to get it right at the source because I want to get it right at the source - I know what I'm doing with tones and have very specific things in mind, so when my Kemper turns out to lack very basic tools that I need to use to achieve those goals, it's frustrating. Yes, I could do this on my gtr bus or have the FOH guy do it, but I'd prefer if I could track with the tone in mind without having to resort to software monitoring via the DAW to achieve it.


    That, and the previosuly mentioned use of filtering off top-end fizz to boost more useful, clean high-end into the tone is HUGELY useful and something I want to do more often at the source.


    Looks like I've got my weekend sorted out - comparing clips of the shelves trying to act as filters, the wah filters, and actual EQ filters.


    @ckemper, what I'm mostly saying is that regardless of whether or not the Wah filters get me the sonic results desired (I haven't tested thoroughly; I'm against the concept of using them and the controls aren't intuitive for this purpose), I think it's insane that you want me to use two FX blocks just to get HPF/LPF features that should just be included in the studio EQ itself. All IMO of course; it looks like I'm not alone in that desire, though.

    Since it's very common to use extreme low/hi cut curve and dB settings when mixing I think it would be good to implement this so the kemper can copy those settings many are used to.


    Jeff, I think it would be great if you could post two images of your freq analyzer, one using the DMG eq plugin settings, and then the kemper eq settings needed. That would demonstrate the differences. Using our ears is always important but in some cases a freq analyzer can pinpoint in extreme detail what the ears can't do in a similar way.


    I'd be happy to post screenshots later tonight; it's obvious what you see. The reduction in low end is great until -12db, where the low shelf bottoms out; after that point you get a ton of sublows still coming in, albeit quieter. It's better than nothing, but there's still a lot of low end bouncing around that I'd rather kill entirely (especially if I'm trying to filter before the amp to tighten up my pickup, for instance).

    That's absolutely not the case, though - the low shelf set to -12db doesn't remove as much low end as a true HPF would. There is no way to roll off enough of the sublows at -12db without eating into the useful low end of the guitar signal (I don't want to be filtering up to 200hz just to get all of the crap at 80hz out of the mix).


    In any case, the real problem is with the top end! I want to filter off after 12khz because it's usually just gross, ratty top end, and I can push more highs into a tone if I'm removing that nasty fizz with a filter. But -12db on the high shelf still doesn't do this; the point at which the fizziness is removed makes the tone too dark to use because the rolloff point has to be set far lower than 12khz to get rid of the stuff above it.


    It seems like you either don't believe that I'm having an issue or assume that I'm doing something wrong - is this accurate? I don't know how to make my request any more clear; given the current EQ and Wah controls, I cannot get HPF/LPF effects to my liking. As such, I am requesting that we're given actual filters to control and feel like I'm being ignored or brushed under the table as someone complaining about a non-issue.


    I appreciate you testing like this and posting; if there's no audible difference between those two, that's wonderful, but having a single filter inside an FX block with the wah controls is an unacceptable workaround to me because it leaves you with only 1 block for wet FX after you're done.


    That said, I don't hear the same thing you do when I'm listening on my monitors and in a mix. If I have to post a/b clips then I'll find some time to do that, but right now without using up 2 extra blocks I can't do the HPF/LPF stuff I usually do, and being able to have that in the tone itself instead of a plugin would be great.


    The biggest issue here is UX - it's a horrible user experience to be told to deal with some janky workaround because there "isn't an audible difference" despite it being a repeated, popular request and a standard feature on other products on the market.




    Ckemper, what I'm doing in this case is looking at an EQ plugin with a built-in spectrum analyzer (DMG Audio's Equality) and comparing the stock hpf/lpf in the plugin (variable slope/frequency, true filters) to the high/low shelf on the Kemper set to -12db and changing the hz to try to get as close as possible to the same cutoff curve as I can with the filters in Equality. I can get close, but it's not the same; even at -12db, there is enough sub-low and 'air-like' top end making it's way through and it definitely effects the tone.


    If I use the studio EQ shelves to roll off low end, by the time I'm getting rid of all the sub-lows I want, I'm at like 300-400hz on the dial, when I want to be closer to like 120hz.


    I think the real issue with shelves vs filters is that the shelves only go to -12db; I want to go to minus infinity at the same slope.



    A Hertz scale for the Manual control on the Wah filters would help, but it doesn't solve the problem of having to use two FX blocks to get an HPF/LPF combo going - this means that EQ + filters is taking up three entire blocks, leaving me only one remaining post-amp block.

    I've read the previous threads on it and know that ckemper himself has said he sees no use for it and that he doesn't think steep curves are the way to go about shaping a guitar tone, but I 100% disagree.


    I have yet to mix a record where the guitar sounds better without a HPF around 80hz and LPF at around 13khz, usually around 24db/oct steepness. I know tons of live engineers who default to even greater extremes like 120hz/5khz on the desk. Granted I'm speaking primarily in regards to high-gain rhythm guitars in a metal/hardcore setting, but this is something I do regularly and something I have really tried to replicate via the wah hpf (takes two FX blocks just for filters) and the eq low/high shelves turned way down, but when either blind or viewing a frequency analyzer I cannot replicate the same dramatic cutoff on each end that results in what I find to always be a more natural sounding, better fit for the mix, less battling with the vocals guitar tone, despite the unnaturalness of the processing.


    That's just one use case - now that you can blend a DI in with the amp feed for a common DI + amp bass rig, why wouldn't you want to be able to hpf the crap out of the amp signal? I very, very frequently run bass tracks through a guitar amp to get a really nasty sounding grit on it, but then filter out below 800hz or so to keep it from muddying up the low end; to be able to do this right in the KPA would be amazing!


    There seems to be this kind of "I can't see a legitimate use-case and/or it wasn't designed that way, so your feature request is invalid" mentality around some of requests on here (dly/verb fx before amp block comes to mind) that can be really frustrating as a user. That said, I have 2 very legitimate use-cases outlined here that are both 100% possible in nearly ever other amp simulator at/near/below the KPA's level (AxeFx+Axe2, Eleven, PODxt), and I sincerely hope I'm not alone in thinking this isn't a ridiculous feature to ask for.

    I agree with what you said about the tuning/playing even the graphics


    There are some commercial guys that go the other way with very impressive web design/graphics but not that great a product but all fair the price is cheap


    I did really like some of the harder samples tho, not stuff for the Brootz but for hard rock I think killer

    Super confused, where did I mention graphics? The production quality of the promo video and promo graphics is another issue entirely - that shit would be horrible by 1990s standards.