Kemper USB audio crackling sound in monitors

    I'm trying out the new Kemper usb audio feature, seems to be working well on all points except I'm getting crackling noise from my studio monitors. This doesn't occur when using my regular audio interface. I've noticed that this doesn't occur when using the Kemper output Stack setting, only Master Stereo or Mod Stereo, so the crackling appears to be linked to stereo in some way... What am I doing wrong? Any settings I'm missing somewhere?


    Kemper --> Reaper --> KRK Classic 5

    Quote from Kemper Support #1

    the buffer size can only be set in the audio settings of your DAW.

    Managed to sort the crackling out by muting the track in the DAW and monitoring directly from the Kemper. This works well during recording or just playing around. However, the crackling reappears once the track is unmuted and I want to listen back to the recording. The issue must be somewhere in the PC or DAW, but changing sample rate or block size in the DAW doesn't seem to make any difference.

    Changing the block size will make a huge difference. Adding some plugins in DAW can lead to cracks and pops also causing you to increase block size even more -- but that increases latency. With ASIO4All, you should be at 44,100hz and s block size of around 144. Lower than that with bring in the unwanted artifacts.


    Here are two configs settings that work without much problems



    Larry Mar @ Lonegun Studios. Neither one famous yet.

    Thanks, will try out 144 block size. I’m on Mac though.

    Quote from ehelkimo

    Thanks, will try out 144 block size. I’m on Mac though.

    Just keep raising the block size until the artifacts are gone. You might have to go higher than 144 or maybe you can go a little lower. At 144, I am 3.6ms latency which is about 4 feet from a cab or drummer if you monitor thru DAW.

    Larry Mar @ Lonegun Studios. Neither one famous yet.

    Quote from BayouTexan

    Just keep raising the block size until the artifacts are gone. You might have to go higher than 144 or maybe you can go a little lower. At 144, I am 3.6ms latency which is about 4 feet from a cab or drummer if you monitor thru DAW.

    Thanks again for the reply. I've managed to solve the issue now. My main profile I use the most (a high gain Dual Rectifier was apparently too hot for the signal chain to handle. Turned down the treble boost and the cracks and pops disappeared. I'm still confused because this was not an issue before, with my regular audio interface...