It appears that after an update or change of firmware the levels get higher or lower than what number specifies is so you can never turn it low enough as reported by other users here on the forums. I think this needs a fix or mentioning as a sticky?
Numbers 1 and 2 were in the correct order
This is what worked for me as I mentioned this is all copied from the brilliant wikidocument as made by viabcroce. Numbers 1 and 2 were in the correct order.
"INSTALL OR REINSTALL THE FIRMWARE
switch the main knob off;
download the latest KPA firmware;
get an empty fat32 formatted USB stick;
copy the unzipped firmware file 'kaos.bin' to the root folder of the USB stick;
plug the USB stick into the KPA;
press and hold both '<' and '>' keys;
switch KPA to tuner while still holding both keys;
something like 'booting and installing' will be displayed;
wait until the firmware is reinstalled;
erase the internal flash memory. Note: all the rigs will be erased during this procedure!
switch the main knob to off;
hold the left/top soft-key above the LCD;
switch KPA to tuner while still holding this key;
Maintenance Module will be started;
in the 'Maintenance' menu go to 'Memory';
use Memory FormatFlash and InitFlash;
check if the KPA works (booting, tuner);
reinstall your rigs. I recommend to just install the stock rigs (in case you have corrupted rigs on your
USB stick);
load additional rigs;
check if all rigs work.
CHECK THE KPA HARDWARE
switch the main knob to off;
hold the left/top soft-key above the LCD;
switch KPA to tuner while still holding this key;
Maintenance Module will be started;
in the 'Maintenance' menu go to 'Test';
a lot can be tested (buttons, knobs, led, memory…).
WILL I LOSE MY DATA ?
A system boot will not affect the profiles (but will cancel user settings). Formatting the flash will cancel
everything.
RESETTING KPA TO FACTORY DEFAULTS
After doing a bit of research this is the procedure that seems to work to cure all aliasing, output, gain,
noise, pop, clicks and other misc odd things. I believe the reason for this is extremely: corrupted system
settings. It seems to occur out of the box. Simply upgrading firmware does not fix the corruption nor does
deleting rigs.
The symptoms my KPA was exhibiting were:
1. Out of the box, first thing I noticed was popping/clicking every so often, I was using XLRs at the time (I
believe this indicates you have corruption).
2. SPDIF levels extremely loud, clipping on every preset into my audio interface, my SPDIF was set to slave
to the KPA and 44.1 kHz.
3. Sound was slightly odd sounding, never could put my finger on why
4. XLR outputs outputted a very gainy signal which was NOT clipping my interface, again, subtle but odd
and hard to deal with in terms of gain levels on my interface, seemed I could never set the KPA's volume
levels correctly for certain profiles
5. Noise levels got extremely high and I thought my guitar was broken. Eventually I realized I could literally
tap the tip of my guitar cable on a table and hear it easily through my speakers.
6. odd high note aliasing tones which people are posting about.
A system and a MIDI reset didn’t help. Then I performed the Flash Memory wipe as such:
Downgrade firmware to 1.04, I believe latest 1.08 does not allow getting into the system
maintenance menu;
2. erase the internal flash memory.
1.
Note: ALL the rigs will be erased during this procedure!!
switch the main knob to off;
hold the left/top soft-key above the LCD;
switch KPA to tuner while still holding this key;
Maintenance Module will be started;
in the 'Maintenance' menu go to 'Memory';
use Memory FormatFlash and InitFlash;
check if the KPA works (booting, tuner);
check all the KPA settings;
go into the SYSTEM block and hit Factory Rigs right most soft button. This restores all factory defaults.
After this your KPA will be fresh, like new, and more importantly have cleaned out FLASH memory and
should work flawlessly!
All my problems have been solved meaning no noise, no popping, gain controls are perfect, output levels
are perfect, high note aliasing noise gone."
It seemed to help me even