I think I have most probably found a bug. This can be reproduced on latest OS version (5.0.3) and latest beta OS (5.1.0x) at least. This was causing me a lot of pain as it was my first time I tried reamping with Kemper. One friend of mine was able to reproduce this (he has same DAW and interface as I got).
Here's my video on YouTube about the problem:
It can be reproduced also with clean profiles + other Kemper's overdrive stomps. On this video I used hi-gain profile and "Green Scream" stomp.
- DAW used: Reaper
- Audio Interface: Komplete Audio 6
Here's comments about the video:
- 1st part: Guitar track (DI and dirty) recorded using SPDIF output setting "Git/Stack" with overdrive (in Stomp A slot) activated (guitar -> Kemper front input -> Kemper SPDIF out -> Komplete Audio SPDIF in -> DAW) ---> no problem with the sound
- 2nd part: Same profile (and same recorded DI track) + OD activated but reamping using "SPDIF reamping" input setting in Kemper (DAW -> Komplete Audio SPDIF out -> Kemper SPDIF in -> Kemper SPDIF out -> Komplete Audio SPDIF in -> DAW), SPDIF Output: "Master Stereo" --> bad noise
- 3rd part: Same setting as in 2nd but OD off - otherwise the same setup as in previous --> no noise