Kemper Amps Forum

Quoted from "Dogman"

When I measured the Kempers latency from input to output I got 5 ms - which is already noticeable
.....
And by the way: those 5 ms seem to be a stable figure no matter which rig I use or if I turn all effects and the amp-modeling off or not.

This intrigues me as I remember getting similar numbers when testing this myself when I got the KPA, but I thought that maybe it was just down to an error in my testing. Anyways, the feel of a KPA is great, but as the latency should be around 2 ms according to Kemper could these higher latency readings be caused by some kind of bug and there would be room for some improvement?

This really does not matter that much to me - the KPA does react fast and feels really nice to play. Just a thought that came to my mind.

Please remember, that additional A/D and D/A conversions also add a little latency to the signal, normally 1 to 2 msec. When i started using a SPDIF digital connection from the KPA to my audio interface i had the impression that Playing the KPA felt a little more "direct".

I then did a little test. I recorded the KPA signal over spdif to one track. Simultanously i recorded the signal that uses the analogs outs of the KPA into the XLR Inputs of my interface to a second track. Here´s a screenshots when zooming in both tracks:


Though i connot say exactly how many msecs the latency is, you can see clearly how the two additional conversions cause an additional delay.

If you have a noticable latency you might try a spdif connection. To me, it feels a little better.

i have no shame in calling my Kemper a "she" !!!
you know -you have to be honest about these things.....
And i also think "sHE" looks very sexy in a kind of fifties radio/ telefunken/ sci fi / start trek/ BORG-kind of way

XXX
JJ

Just tested this with the following routing:
KPA direct out to analog instrument input of my audiointerface recorded to one track.
KPA SPDIF out to SPDIF input of the same audiointerface recorded to separate track.

(As I understood from a post by Mr. Kemper on a separate thread there is no AD/DA conversion inside KPA when using the direct out, it just passes the analog signal through).

The difference between the simultaneously recorded signals on tracks was around 180 samples which to my understanding would be around 4 ms at 44.1 KhZ (the direct out obviously being 4 ms earlier). Adding to that around 1 ms AD conversion for the analog instrument input of audiointerface (that is missing from the 4 ms latency between tracks) would make the latency of KPA measured from guitar input to track about 5 ms. Not that much, but still different from 2 ms. Maybe/probably this test has a flaw in it - I'm not that familiar with these matters.

Anyway I’ll get back to playing guitar as this 2 or 5 ms really does not matter to me feel wise at all. I’m a very “happy Kemper” and more amazed by this unit day by day. But my tech-nerd side is intrigued – eventhough I try to subdue it.

Quoted from "kojak"

i also noticed an increased latency when using the PROFILER mode. I was using headphones, which i'm used to with my AxeFX standard. In BROWSER mode, i haven't noticed any substantial latency in direct comparison to the AxeFX.

Does this matters? I mean, if you're profiling you're not playing... Not meant to to be unfriendly

The latency is NOT 5 ms. That is how long it may have taken to go through your DAW via conversions. I am using it via TotalMix direct monitoring, and having played at 3ms with plugins for several years, I can tell you this is less than that. The original 2ms figure is correct.

One has to wonder why Mr Kemper bothered to do latency tests himself, he could have just waited for the results of latency tests posted here.

Quoted from "Guitartone"

One has to wonder why Mr Kemper bothered to do latency tests himself, he could have just waited for the results of latency tests posted here.