Troubleshooting

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Contacting Support

Should you experience a malfunctioning with your Profiler, make a backup if possible and send it to support@kemper-amps.com along with your FW version.

-timo
 

Emergency Procedures

Emergency Procedures


Sound-related issues

Sound Issues


Lost Settings

Lost Settings


Rig & File Management

See Rig & File Management.

Detailed Method on How to Backup, Edit, and Restore

PC/Windows Instructions

  1. Download and install 7-zip on your PC.
  2. Create a backup of your Profiler data on your USB stick (Profiler User Manual page 36).
  3. Remove the USB stick from your Profiler and plug the USB stick with the backup into your PC.
  4. Open the USB stick using the File Manager on your PC.
  5. Open the Folder Backups, which contains your Profiler backup archives e. g. 2012 2012- -- -07 0707 07- -- -13 17 13 17 13 17- -- -27 2727 27- -- -25.kpabackup. (The archive name indicates the creation date).
  6. Select the latest backup, cut and paste it to your desktop.
  7. Right-click on the backup archive on your desktop, chose 7-zip, select Unpack file.
  8. A pop-up window will ask you to confirm the path where the unpacked data should be stored. Press Ok.
  9. Now you see a normal data folder on your PC desktop with a name like 2012 2012- -- -07 0707 07- -- -13 17 13 17 13 17- -- -27 2727 27- -- -25 2525 25. 10. Double click on this folder.
  10. You’ll see the various folders for rigs and different kinds of local presets.
  11. Double click on the folder Rigs. Here you’ll find one file for each rig on your Profiler.
  12. Now you can start your clean-up work and delete the rigs you don’t need any more.
  13. As soon as you are done with your clean-up work, close all folders.
  14. Now is the right time to store the original backup archive in a safe place on your PC and avoid conflicts with the new cleaned-up backup archive, which will carry exactly the same filename. Select the original backup archive on your desktop 2012 2012 2012- -- -07 0707 07- -- -13 17 13 17 13 17- -- -27 2727 27- -- -25.kpabackup, cut and paste this into a folder on your PC, where you store all your Profiler-backups. Should you accidentally delete a rig during the clean-up process, you can always restore this backup and recover all your data.
  15. Double click on the unpacked backup folder on your PC desktop.
  16. Select all the files and folders contained (Amplifier, Tonestack, MIDI Assignments…).
  17. Right click, select 7-zip and Add to an archive.
  18. Important: Make sure you don't compress the files! You just have to pack the folders and files into an archive. The Profiler can't handle compressed files.
  19. A new 7-zip window will pop-up suggesting name and format of the new archive.
  20. You can leave everything as suggested, but you’ll need to change the file extension in the first row from tar to kpabackup, so that the file name is identical to the name of the original backup archive you stored.
  21. You will now find a new backup archive amongst the folders. Cut and paste this backup archive into the Backups folder of your USB stick.
  22. Plug the USB stick into your Profiler.
  23. Restore this backup on your Profiler (Profiler User manual page 36)
  24. Congratulations! You just cleaned up your Profiler.
  25. Now is an excellent time to create a new backup of your ‘clean’ Profiler. This new backup archive will carry the actual time stamp in its name. You should add this backup archive to the backup folder on your PC.


Mac Instructions

  1. Download and install GuiTar on your Mac.
  2. Create a backup of your Profiler data on your USB stick (Profiler User Manual page 36).
  3. Remove the USB stick from your Profiler and plug the USB stick with the backup into your MAC.
  4. Open the USB stick by double-clicking on its icon.
  5. Open the Folder Backups, which contains your Profiler backup archives (e. g. 2012 2012- -- -07 0707 07- -- -13 17 13 17 13 17- -- -27 2727 27- -- -25.kpabackup. The archive name indicates the creation date).
  6. Select the latest backup and drag it to your desktop.
  7. Add the suffix ”.tar“ to the filename. Select the ”use .tar“ option in the pop-up window that appears. You will now see a tar archive on your desktop with a name like 2012 2012 2012- -- -07 0707 07- -- -13 17 13 17 13 17- -- -27 2727 27- -- -25.kpabackup.tar.
  8. Double-click on the tar archive and you will see a regular data folder on your OSX desktop with a name like 2012 2012 2012- -- -07 0707 07- -- -13 17 13 17 13 17- -- -27 2727 27- -- -25.backup. Double click on this folder.
  9. You’ll see the various folders for rigs and different kinds of local presets. Double click on the folder Rigs. Here you find one file for each rig on your Profiler.
  10. Now you can start your clean-up work and delete the rigs you don’t need anymore.
  11. As soon as you are done with your clean-up work, close all folders.
  12. Now is the right time to store the original backup archive in a safe place on your MAC and avoid conflicts with the new cleaned-up backup archive, which will carry exactly the same filename. Select the original backup archive on your USB stick and copy this into a folder on your MAC, where you store all your Profiler-backups. Should you accidentally delete a rig during the clean-up process, you can always restore this backup and recover all your data.
  13. Go back to the unpacked backup folder on your MAC desktop and select all the files and folders inside that folder.
  14. Open the GuiTar program by double-clicking on its icon in your applications folder and click on Compressor.
  15. Drag all the selected files and subfolders from the Profiler backup to the GuiTar window and select tar as the compression type.
  16. Click on Compress and give the archive a name like 2012 2012 2012- -- -07 0707 07- -- -13 17 13 17 13 17- -- -27 2727 27- -- -25.kpabackup and save it to the Backup folder on your USB stick.
  17. Locate the archive in your Backup folder on the USB stick, control-click on it and select Information from the pop up menu.
  18. Click on Name&Suffix in the Information window and delete ”.tar“ from the filename.
  19. Hit Enter. Select the Use .kpabackup option in the popup window.
  20. Unmount the USB stick from your MAC and plug it into your Profiler.
  21. Restore this backup on your Profiler (Profiler User manual page 36)
  22. Congratulations! You just cleaned up your Profiler.
  23. Now is an excellent time to create a new backup of your ‘clean’ Profiler. This new backup archive will carry the actual time stamp in its name. You should add this backup archive to the backup folder on your MAC.

NOTES: All this should be done with caution and consciousness that these files do contain your precious data. You should always keep a copy of the original backup file, before you even start to manipulate its content. Don’t modify file names! Renaming of rigs or local presets needs to be done on the Profiler.

Should you delete rigs, which have a MIDI Program Change # assigned, this won’t cause any inconsistencies, because these assignments will be reset automatically during the restore on the Profiler.

If you stick to these rules it’s safe, you won’t lose any data, and the Profiler will perform well.

We strongly recommend not using a hex-editor or similar tools to manipulate content within any of these rig or local preset files e. g. for tagging purposes. This can cause file corruptions which could force hangs of your Profiler. Stay away from these tools!

The main reason why we are packing all user data into one backup archive is that it speeds up the transaction significantly. The time to write data on USB sticks is primarily scaling with the number of files.

I could get none of the suggested ways to work on my Mac. The Profiler always ended up with one initialised rig and nothing else. Then I had a brainwave.

I had been using Stuffit to unpack the kpabackup file. That always worked fine and I could delete as many rigs as I wanted. Then I used Gui Tar or Better zip to repack the folder (then deleting the .tar extension). This always seemed to work but even though the Profiler restored it, it ended up with just one rig and nothing else....until I realized that I was repacking folders within a folder. So the resulting backup file had a folder in which all the backup folders were stored.

So instead of just dragging the top folder to a new backup file, I simply dragged all the contents. This worked a treat! Probably also applies to a PC.

-Gizmo
 

Check The Profiler hardware

  • Switch the main knob to off;
  • hold the left/top soft-key above the LCD;
  • switch Profiler to tuner while still holding this key; Maintenance Module will be started;
  • in the Maintenance menu go to Test; a lot can be tested here (buttons, knobs, led, memory…).

Note: make a complete Profiler backup before performing the check!


Button malfunctioning while importing rigs ?

Q: If I put in the USB stick and go to the final import menu it takes some moments until pressing the button is taking effect. So I wait a little and then press a little longer. In all other functions the hardware button is working fine.

Always been like that, some hidden activity in background, though is not necessary to press longer, just to wait short before it starts.

-guitarnet70
 


Different sensitivity for Presence and Browser knobs

Q: I was renaming several profiles and found that the input of the character from the lower knob (the 'presence' one) is slower than the input of the same character using the browse knob.

The sensitivity of the knobs below the screen has been changed a couple of FW versions ago to accommodate for finer tuning of larger scale parameters (like delay time).

-Guitarnet70
 


Direct output disabled

Q: Since updating, Direct output volume doesn't work any longer. It’s always the same, and letter are "pale" instead of being bold as for other volumes outputs.

Check whether your output is set to Guitar analog: if yes, this is the designed behaviour. Select a different output and you'll have volume control back.

-unknown source
 

Installing or reinstalling the firmware

  • Switch the main knob off;
  • download the latest Profiler firmware;
  • use your usual Profiler-formatted USB stick;
  • copy the unzipped firmware file kaos.bin into the root folder of the USB stick (NOTE: there must be no other copy of the kaos.bin file elsewhere on the stick);
  • plug the USB stick into the Profiler;
  • press and hold both '<' and '>' keys;
  • switch Profiler to Tuner while still holding both keys;
  • something like Booting and installing will be displayed;
  • wait until the firmware is reinstalled.


Problems using the USB stick to upgrade FW

Some USB stick may end up being problematic. It might be advisable to format it with your computer first. Some USB sticks come with special formatting and security software for PC use. Reformatting the them on the PC will get rid of the special software, etc. After that let the Profiler format it again. Then return to your PC and copy the upgrade files to the stick... then back to the Profiler and perform the upgrade.


S/PDIF issues

You can read about users’ experience with different I/F here. In the same thread you’ll find more creative ways of using a S/PDIF connection :)

Issues with the S/PDIF connection? Here’s a list of generic items to check:

  • Connect the S/PDIF output of your interface/device to the S/PDIF input of the Profiler;
  • Connect the S/PDIF input of your interface/device to the S/PDIF output of the Profiler;
  • Go to the Input menu on the Profiler and check the S/PDIF Input option;
  • Go to the Master menu on the Profiler and make sure the S/PDIF Output is set to something other than Off;
  • Still in the Master menu, navigate to the last page and make sure the SPDIF Volume is set to something other than minimum;
  • In your interface/device select External as S/PDIF clock source.
-Deny
 

This is my general procedure regarding crackling noise on Profiler's S/PDIF Out:

  • Set 44.1 as sample rate both on your DAW and your soundcard.
  • Set S/PDIF (not Internal or other) as sync source on your soundcard.
  • Check whether increasing the buffer size (number of samples) on your DAW helps.
  • Check your S/PDIF cables, try a different one.
  • Check your FW version and install the last available FW in case.
-almogaver
 

My S/PDIF input was working ok, but the output wasn't, and here's a tip that might help diagnose whether you have a bad unit or not: with the Profiler's power cord disconnected from the power source, measure the DC impedance on both S/PDIF input and output with a multimeter, both should read a very low resistance. In mine the S/PDIF output read like an open circuit, meaning seemingly infinite resistance: indeed a hardware problem.

-Deny
 

Ok, so, for those of you using Focusrite Hardware & Mixcontrol, I think I found out what was going on here: It took a while, but after trying out different things to no result, I noticed that the crackling issues normally began after switching on my DAW program. Then I realized that for some reason the clock of the device would go back to "internal" (in stead of "s/pdif") on its own. Strangely, this was not always shown in the display...

Anyway, the solution after that turned out to be quite simple: Turn off the KPA, turn Soundcard clock to "internal" and then to "s/pdif" and make sure "no lock" is displayed (remember, KPA is still off). Turn KPA on again and make sure soundcard locks. After that, your system should be stable again.

-Verminante
 

Effects section activates by itself

Q: Every now and then, out of the blue, without me touching the Profiler, the Mod button in the Effects section activates itself. Therefore, sometimes, while I'm playing, suddenly I get the chorus which I've set to be turned off by default in that profile.

this issue could be fixed, if you just turn the modulation knobs Rate and Intensity by 90 degrees in any direction. You could do this even while the unit is switched off. The read-out of these bi-directional 360 degree potis is a complicated matter and they do have a natural spread, so these don't behave exactly the same. The trick is now to optimize the software to be sensitive enough for some potis and not too sensitive for others. It could be, that one of the two potis is a bit out of the norm in your device and therefore it has its own life. As soon as the value of modulation rate or intensity are changing, Mod will switch on. Normally this should only happen in one particular position of this poti. So you if you turn the poto by 90 degrees, you might never experience this again. We have occasionally modified firmware to optimize the software to accommodate for the spread of these potis. But if this happens more often, your poti seems to be out of the norm and you need to get your unit repaired. This cannot be fixed via firmware, then you really have a faulty poti.

-Kemper
 


Problems using volume pedal

Q: I have an issue using a volume pedal. I get the same problem whether I use it as a volume pedal in the signal chain or as an expression pedal using the MIDI CC. Basically, if I'm using a clean rig, all works as expected, the pedal swells from zero to full volume in a normal manner. If I select a high gain rig then there is no swell... it goes from zero to full even if the pedal is only at one or two... I've tried switching the noise gates off .. Volume location is pre stomps.

Q: I think I have the same problem. MIDI volume pedal works not like a (channel) volume knob more like a gain knob.

You need to move the volume pedal to after the digital effects to get the desired effect. If you put a volume pedal in front of a tube amp it would just be the same. It should be anywhere behind the amp section - so choose Pre effects or Post effects. That's one of the marvels of the Profiler to me: on a real tube amp you could not do that, put a volume pedal behind the amp. But remember to tick the Lock Vol. Pedal option. Otherwise your choice will only apply this single rig. And also maybe good to know: I had several occasions in the past where after a firmware update (or other maintenance, like resets and stuff) the Lock Vol. Pedal option got unchecked again.

-unknown source
 

Q: Is there a way to change the volume pedal location for all rigs or do you have to do it separately to every rig if you want to change location for all your rigs?

Hit the Rig button, go to volume pedal settings, choose what you want, check Lock volume pedal (first soft button).

-unknown source
 


Fx loop doesn’t work

Q: I’m trying this configuration, but it doesn’t seem to work… Guitar --> Profiler --> Direct Output Send --> Multifx -- > Return

You need to put a Distortion loop in one of the stomps in order to activate the loop, is not permanently on. Press and hold the desired stomp (A, B, C or D) and then turn the Type knob 'till Distortion loop appears. Adjust the in/out levels to avoid clipping and rock on! And you can activate and deactivate it with a MIDI controller so you pedal can be always on and hidden in the back of the Profiler and use short cables.

-unknown source
 


Selling the Profiler

Transfer Ownership

As soon as the new owner will register using the serial number he will get the "owner" status and you will loose it.

-guitarnet70 @ Kemper Forum, February 26th 2013
 

You have the option to de-register your Profiler in your user account, an option that we recently added, but you don't have to.

-Burkhard @ Kemper Forum, February 2th 2013
 

Transfer Warranty

If you privately sell your Profiler to another user, generally you just have to notify the seller about the transaction supplying the receipt details in order to transfer the warranty to the new owner. NOTE: Local terms and conditions may be different in different countries

Midi

NOTE: for a creative use of the MidiAssignments file see the MIDI section.


Recalling Wrong Settings on Shutdown/Bootup

Q: I am using my VG 99 through the spdif of the Profiler. I am running channel A from the 99 into the Profiler S/PDIF in, and then the main outs of the 99 into the effect returns of the Profiler in stereo. I store the rig, but the next day I must choose the S/PDIF input again, and the mix level of the stereo effects (99) is not where I left it on that patch, but rather where I left it when I shut it down for the evening.

A: DonPetersen - This behaviour is intentional. The Profiler remembers the state of the rig when you power it down and recalls that (in case you forgot to save). If you want your saved values after the Profiler booted, select another rig and switch back to the first one again, this will call up the stored values.


Why no Qualified Values for Parameters?

Q: Adjusting parameters, like e.g. center frequency, bandwidth, volume etc, the display only shows numbers from 1-10 or +-5. Is there a hidden setting somewhere with a display choice?

A: Donpetesen - Low Pass shows 1-10, that is correct, but the Studio EQ shows the values as dB, Hz and Q.

The EQ of the stack section displays -5/+5 on purpose, the unaltered profile always has a neutral EQ setting. The bandwidth control in the delay section is a little more complex than just a simple bandwidth of a band pass filter, therefore a Q value does not apply. It's ears over eyes with this one.

The same applies to the center frequency. Many parameters are very carefully scaled to ensure a maximum of musicality. Again, a Hz value might actually distract people from following their ears. These controls interact very intuitively and make it simple to find the desired delay sound.


Date/Time clock failure

Should you receive a Hardware Issue detected - Date/Time Clock failed. Please contact support warning from your Profiler, it could be related to an exhausted or misplaced or defective backup battery (at best), but it might also be an issue with the quartz of the clock. The clock is important because all rig and preset names are enhanced with a time stamp on file system level. This way the file system makes sure, that each file gets a unique name, because you could give two rigs the same name e. g. 'Max'. If the clock isn't running two files could have exactly the same name and this could cause data integrity issues. While you are still working with your Profiler please take care and assign unique names, if you store anything. [timo] If you have a rig and you modify it and try to Store As, it will overwrite the previous rig without warning, since all rigs now do have the same time. So the actual "rig name + rig datetime" is staying the same. The Profiler needs a working clock.


Paste buffer is empty

If you get the "Paste Buffer is empty" error, boot the unit holding System pressed 'till you read "Initializing...".