Posts by piotrmaj

    And I do get these threads - we all have different needs, love this hardware, want it to be better and not share the fate of Virus. As much as KPA sounds and feels great its hardware is outdated and due for revision (I'm talking about Toaster). Audio via USB is a standard and useful feature nowadays. Startup time of over a minute sucks big time (during my latest gig we managed to blow up fuse and power down the whole stage) - when we got power back all devices, except my KPA, were ready to go within 10 - 15 seconds, KPA needed over a minute. UI is noticeably slow on Toaster when you compare it with... pretty much any gear produced in last 5-7 years.


    KPA Stage is a step forward in a sense that its main CPU is much faster, but still misses modern means of sending audio to / from computer. Not to mention that lack of MIDI via USB (every single device which as USB port I came across do it - KPA chooses to stay behind, for reason I just don't get).


    I care less about touch-screen, although it would be a good addition. I have a few synths, some with touch screen, some without - the one with touch screen is way more convenient to use. But synths have very deep structure to tweak - KPA is super simple, so touch screen wouldn't probably help much.

    I am wondering if it is your electronics of guitar. I had a new guitar that when you move the pickup switch from neck to bridge or vice-versa the guitar would mute unless I flick the switch around. So the switch was bad even though brand new. Can you check with another guitar? If you get the same problem with a different guitar then contact support as ST suggests.

    I had similar issue with 2-years old PRS - spraying DeoxIT helped (very common issue), but I doubt this is what OP is experiencing, judging by the peculiar way in which the issue is reproducible.

    I have hard time to believe that any 10 year old chip could be irreplaceable by newer ones. Latest DSP chips, like the ones in AXE FX III or Quad Cortex are orders of magnitude faster, so even if they lack some instructions implemented in this particular chip they could probably be emulated equally fast, or they have their own dedicated instruction sets for solving similar DSP tasks. Chips used by competitors are perfectly capable of emulating / profiling any amp. Great advantage of KPA's "old" CPU/DSP chips is that they don't require external cooling (which is very annoying in AXE FX), but even this point will not matter in near future, as we're entering era of really low-power, high performance chips (look what Apple's M1 CPU is capable of doing pretty much without even becoming warm).

    Looper in FM9 is longer (120 seconds), it has built in synth (you can create drone and jam over it), flexible routing, many more effects. But it is a modeler, so you're stuck with what it models (it models a lot though, so I don't consider it as a huge disadvantage). Editing patches on Fractal devices is miserable experience, in my opinion and to get most out of it you need to connect it to computer. KPA has more straightforward workflow, at least for me. KPA is a stable platform and updates don't change sound which is not the case in Fractal world which tends to do hardware revisions quite often and from time to time releases firmware which changes sound of patches. KPA it cheaper in a long run (free, high quality updates for last 10 years!).


    Overall both are great platforms and you can't go wrong with any - both sound and feel great. If you already have Stage I don't think investment in FM9 would be the best move. If you had nothing yet you could toss a coin and probably you'd be happy with either platform.

    The Kemper is targeted at tube amp + pedal board players that have made the jump to digital.

    I hope this is no longer the case. New, digital-first, generation of players is growing at rapid pace and I do really believe that this constat obsessive looking back at old tech is leading nowhere. Just like new cars are not targeted at fancy horse-carriage fans (there are still many - I even took a ride at my wedding :-) ), modern musical equipment should offer much more than just replication of old habits.

    MIDI and audio via USB would be great addition as well in 2022. I managed to convert my studio to just USB (including Access Virus) and KPA is the only unit I have which still uses DIN-5 and forces me to have additional interface. I wish it was possible to reamp via usb. I guess it would be possible to add this to KPA1 (midi part should be trivial).

    I don't think you can enter sysex directly in Logic. You'd have to "record" it first on a midi track and then copy and paste. But I personally would stick to regular CC, something you can edit in Logic.


    Pro tip: you can copy and paste all four Midi CC events in Events table and while new events are still selected you can edit position of all four messages at once. This makes entering NRPNs less annoying.


    Pro tip #2: if you want to do a ramp (gradually change value of given parameter) it should be enought to just repeat CC#38 with new value. You can record such events as automation in Logic.

    NRPN is just 4 CC send in quick succession. They have to have specific numbers:


    1. First is CC#99 - aka NRPN-MSB
      Value corresponds to address page from KPA's MIDI manual
    2. Second is CC#98 - aka NRPN-LSB
      Value corresponds to parameter number from KPA's MIDI manual
    3. Third is CC#6 - aka Data MSB
    4. Forth is CC#38 aka Data LSB

    Data MSB and LSB together form a value for parameter addressed by page and parameter number.


    For On/Off parameters CC#6 should be 0 and CC#38 should be respectively 0 and 1.

    For parameters which have continuous values (like volume, morph) you can specify any value for CC#6 and CC#38.

    You can think of value provided with CC#38 as ones place of a two digit number and value provided with CC#6 as tens place of two digit number.


    For example in Logic this should turn amp on:


    Remember to space out MIDI messages by more than one tick - don't sent them all at once (look at position in the screenshot) - too many MIDI messages sent too fast == KPA crash.

    I have older version of Babyface Pro and was using it via XLRs - RME's preamps are crystal clear - you won't notice _any_ meaningful difference between XLRs and SPDIF. I don't recommend using coax to optical converters. Those are powered devices - you'll end up with 4 cables for data in total, two converters and two additional wall warts. Analog connection is simpler and your desk will be free of clutter - just two cables and that's it.

    Don't force it. Try something else - maybe a real amp you always wanted to have. Spending months on tweaking the tone seems like waste of time, especially when it is source of frustration and kills your creativity. Don't know how old you are but our perception of things and hearing sensitivity changes over time as well and it is quite normal. Hope you'll find your tone eventually.

    Code
    1. MIDI.sendControlChange(99, 125, 1); 
    2. MIDI.sendControlChange(98, 89, 1);
    3. MIDI.sendControlChange(6, 0, 1);
    4. MIDI.sendControlChange(38, 1, 1);

    Last parameter is channel - it doesn't change.

    I'm not really good at debugging via forum, but at first glance you're using INPUT_PULLUP, which I think makes your button normally HIGH and LOW when pressed. Your code appears to assume your button is normally LOW. Check your output using serial monitor or oscilloscope to make sure that correct values are sent.

    I was out of town for a few days - checked today and this sequence of CC works for me (I'm sending them from Logic to KPA). You might have a bug somewhere else in your code.

    If you replace line 13 with something like:


    MIDI.sendControlChange(99, X, 1); // this will set MBS of parameter (on Kemper it is address page)

    MIDI.sendControlChange(98, Y, 1); // this will set LBS of parameter (on Kemper it is address number)

    MIDI.sendControlChange(6, V1, 1); // this will set MBS of parameter value (first 7 bits of 14-bit value)

    MIDI.sendControlChange(32, V2, 1); // this will set LBS of parameter value (last 7 bits of 14-bit value)


    This will effectively be an NRPN message.


    You have to look up X and Z in Kemper's MIDI manual (look at Downloads section) and also read in manual how V1 and V2 values are interpreted by KPA.

    Instead of sending one MIDI.sendControlChange you'll have to send 4 CC messages, one after another. Each of those 4 messages will contain a quarter of information needed to form NRPN message. Paste some code - will be easier to help.

    NRPN is nothing else but 4 MIDI CC messages in a row. Two first CC choose parameter, two latter value. Two messages are used to jump from 7-bit values to 14-bit values. In both cases first message sends most significant bits, second message sends least significant bits. When you already built your own MIDI controller which can send MIDI CC all you need to do now is to send 4 MIDI CC messages on a single key-press with correct values. Values for CC and parameters are described in document: "PROFILER MIDI Parameter Documentation", which can be fetched from Downloads page, User Manual section. Good luck!

    Nice, congrats! Reminds me of me buying KPA 5 years ago. :-) Also couldn't stop playing for hours! The good thing is that even after 5 years I still enjoy it like on the first day. Gear for life! Have fun, WillemNL!

    Tutaj to juz raczej niczyja opinia Ci nie pomoze. Musisz sprawdzic samemu - mi nie podpasował - chyba za dużo lat gralem na minitorach studyjnych i Kabinet brzmi mi obco - fajnie na czystych, ale na przesterowanych brzmieniach do absolutnej d.... Uzywam go teraz jako wzmak do klawiszy i jestem zadowolony.