I get crack noises on SPDIF after switching rigs

Peto · Nov 2nd 2014

Hi guys,

I get crack noises on SPDIF after rig switch occurs. On analog outputs everything is OK - no crack noise.
It is somewhat not rig dependent, but I perceive it mainly on mid to high gain rigs.
After few seconds there are no further cracks. Somewhat it settles down. It is similar to what we did experience with switching to clean rigs, but this time it is not so intense and it only happens on SPDIF.

I tried to record it, there are 2 recordings - one Analog output, one SPDIF and one file is difference between the two made by Audio diff maker software.
The crack is located in the middle of the recording.
https://soundcloud.com/peto_91…-rig-switch-spdif-crack-2

In the recording I am switching from Golub crunch to Morgan AC20.
Tried fw 2.6 & 2.7. Both do this.
Is anyone experiencing similar issue?

MentaL · Nov 2nd 2014

I don't hear it? (KRK RP5G2)

Peto · Nov 2nd 2014

Hi MentaL, thank you for listening.
The crack sound is even visible on the third track of the playlist: "Analog vs. SPDIF difference".
At the same time it occurs in SPDIF recording.

paults · Nov 2nd 2014

I suggest not changing sounds in the middle of a chord. The change to a new sound is more musically powerful if you play another chord.

Peto · Nov 3rd 2014

Quote from paults

I suggest not changing sounds in the middle of a chord. The change to a new sound is more musically powerful if you play another chord.

Thank you Paults for the suggestion, but the crack sound occurs 3 seconds after I switched to a new rig and after I played new chord. I started this thread to point out that there is a bug which should not be there. I am not searching for workaround, I wanted to know if others also do notice this bug.

paults · Nov 3rd 2014

Quote from Peto

Thank you Paults for the suggestion, but the crack sound occurs 3 seconds after I switched to a new rig and after I played new chord. I started this thread to point out that there is a bug which should not be there. I am not searching for workaround, I wanted to know if others also do notice this bug.

I didn't realize it was three seconds after switching. I suggest sending this to Kemper Support.

Peto · Nov 3rd 2014

Quote from paults

I suggest sending this to Kemper Support.

Today, I did. Will update this thread with result.

nightlight · Nov 5th 2014

Are you sending more than one command from your midi foot controller? That can cause crackling and popping sounds, in my experience.

Peto · Nov 5th 2014

No, not using MIDI controller at all. I was switching rigs with KPA buttons in browse mode.

nightlight · Nov 7th 2014

Try a system reset. It might help, I've heard of it sorting out a few issues because sometimes the firmware or profiles on the Kemper get corrupted.

Peto · Nov 7th 2014

Quote from nightlight

Try a system reset. It might help, I've heard of it sorting out a few issues because sometimes the firmware or profiles on the Kemper get corrupted.

Thanks for suggestion, but I don't think reset will cure crackles which occurs only on SPDIF. And system reset may helped some time ago with specific bug, but it is not magic wand. FWIR system reset only sets globals to default values(?)

nightlight · Nov 8th 2014

Do a firmware reset. Or reinstall the firmware by loading kaos.bin on the root of your USB and hold down <> while booting.

Not a magic wand, but it does indeed help sometime with such issues.

ckemper · Nov 9th 2014

What firmware version are you on?

Peto · Nov 9th 2014

Hi CK,
I wrote it in OP: Tried fw 2.6 & 2.7. Both do this.

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