noise after profiling

    At first I want to say hi to the community. I'm a quite new Kemper owner, got my Kemper Rack a few days ago :)
    I did some tests with profiling and something caught my attention: in profiling mode, right after the profiling process, after the test sounds have been played,
    when listening to the Kemper profile I get a noise floor which does not come from the guitar itself- the guitar, when played, overlays that noise - it rather sounds like a short loop of noise recorded when no guitar signal was there. It really seems to be a short loop of sound (white noise as I profiled a high gain reference amp) while no guitar is playing and it is only audible when listening to the Kemper profile, not when switching to reference amp. I can't turn it off with the noise gate, it's only affected by the volume/ master volume knobs. The noise stops as soon as I hit the "Store"-Button and is not present in the profile.
    Has anybody experienced that too or have I overseen something? Firmware is 2.2.1.8963. I think everything is working fine but I thought this to be a bit strange. Looks like a software issue for me...


    Cheers,
    kuraceau

    playing Kemper Rack Version

    Do you A/B with the amp in the same room? Or do you A/B the profile and the mic'ed amp sound say in a control room?
    The hiss actually is the recorded hiss from your amp as the mic "hears" it. It is recorded temporarily to make A/B comparison fair. It's gone when you save the profile or switch back to Browse or Perform mode.

    I've had this too. On one Profile my insane drummer buddie yelled 'SATAN, SATAN' at the mic during profiling, after profiling was finished we heard a looped 'ATAN, ATAN'. Incredibly evil profile, may not be unleashed on humanity.

    Thank you for the quick replies! I'm A/B'ing it in the same room. Well, that SATAN-thing made me laugh :D
    Glad to hear this is normal behaviour of the Kemper.


    Thanks again,
    kuraceau

    playing Kemper Rack Version

    Quote from kuraceau

    it rather sounds like a short loop of noise recorded when no guitar signal was there

    You´re right, that´s how the profiling works. In the process of the profiling the KPA captures a short sample of the background noise when no test tone is being heard. However, this "noise loop" has no influence on the profile. It´s just for making a better comparison between the original amp, that has a background noise and the KPA profile, which will not have that noise floor in it. Without the added noise floor sample, the A/B comparison would lead to many users stating that profile sounds different from the original amp.
    As soon as you switch to browse mode, the noise loop is gone.


    I had the same situation when a friend of mine brought his amp for a profiling session. When he first head the profiling test tones he made a laughing statement and his voice could be heard in a loop when the profile was done.

    Haaaaaaaaaaa!!! this just happened to me! I discovered that if I have a plug inserted the 1/4" return jack, the mike input won't work. Once I figured it out I continued profiling an amp that was in the same room and I yelled "yup, that's it" . When the profile was finished, there it was, playing in a continous loop.. "yup yup yup yup..."


    :P :P :P Scared the crap out of me until I figured out what it was!!! ;(