spdif vs reamping spdif sound quality

jpcesar · Jul 12th 2013

I'm having a big difference between the dirty sound from spdif while recording realtime versus recording via spdif reamping when using the same di recorded the first time.

At the first recording i've recorded both the di and distorted sound Guit/Stack:

DI -> https://dl.dropboxusercontent.com/u/475088/reamp_di.mp3 ( via spdif Guit )
DIRTY ->https://dl.dropboxusercontent.…88/reamp_wet_realtime.mp3 ( via spdif Stack )

After that i've used the recorded DI and send again to kemper and re-record dirty:

https://dl.dropboxusercontent.…088/reamp_wet_reamped.mp3 ( via spdif Stack )

As you can clearly see the reamped one has less low end and less overall quality.

- Clean Sense and Distortion Sense are at 0 in Input Menu.
- SPDIF Volume is 0.0db at Master Menu
- Volume is at middle
- Master Volume is at 10

Why?

THanks

Trazan · Jul 13th 2013

I don't hear less quality, I hear less gain. Maybe you somehow sent a weaker signal back to the Kemper? Pan law?

jpcesar · Jul 13th 2013

Quote from Trazan

I don't hear less quality, I hear less gain. Maybe you somehow sent a weaker signal back to the Kemper? Pan law?

i see... but all channels are mono, i didn't touch the faders and i can't setup spdif levels because im stuck with default options for spdif connections on osx, what could it be that is changing the gain?

[Blocked Image: https://dl.dropboxusercontent.com/u/475088/Screen%20Shot%202013-07-13%20at%2000.07.36.png]

jpcesar · Jul 13th 2013

you are right about pan law, just noticed now from the picture, the channel is mono but im sending in stereo to the kemper (5-6) instead of mono to 5 , ill post feedback.

jpcesar · Jul 13th 2013

if i send the out to kemper in mono i dont get sound back from kemper.

i have to use stereo and hard pan to left. it has a much lesser difference now, just tad bit less gain now, if i give +3db to the di track i think i get the same result as original.

jpcesar · Jul 23rd 2013

The problem is not solved, i still have less gain on the reamp, does anyone have this ? how are other people's setup on reamping? thx

jpcesar · Jul 28th 2013

so everyone is obviously not having this kind of problem.

if anyone is reamping with logic, could post here their channel routing setup ? many thanks

Sollazzon · Jul 28th 2013

Hi jpcesar, I also hear some differeces with the reamped one.
Im going to try to test if the same Here but I didn't understand a few things,
First I dindn't get How you recorded the DI And the distorted one at the the same time.
"At the first recording i've recorded both the di and distorted sound Guit/Stack:
DI -> https://dl.dropboxusercontent.com/u/475088/reamp_di.mp3 ( via spdif Guit )
DIRTY ->https://dl.dropboxusercontent.com/u/4750…et_realtime.mp3 ( via spdif Stack )"
(I can't hear Anything of the DI track)
how did You to rec the DI signal? SPDIF Output setted as git Studio or Git/Stack?

jpcesar · Jul 31st 2013

Quote from Sollazzon

how did You to rec the DI signal? SPDIF Output setted as git Studio or Git/Stack?

exactly, Git / Stack, this way i record 2 tracks at same time, one with input of L spdif and other with R spdif.

Joptunes · Aug 1st 2013

I use logic and will check when I get back home Friday. My reamp experience has been good to date. What audio interface are you using on your DAW?

lohworm · Aug 1st 2013

I have slightly less gain with the reamping too (SPDIF and Git/Stack method, Presonus Firebox)
I have previously posted here : http://www.kemper-amps.com/for…2915&highlight=#post92915

Now I know it, I can live with, and adjusting levels...

nakedzen · Aug 1st 2013

I had less gain when reamping. I realized that the output on my soundcard settings was set below 0dB, which was the cause.

lohworm · Aug 1st 2013

Quote from nakedzen

I had less gain when reamping. I realized that the output on my soundcard settings was set below 0dB, which was the cause.

it was a setting on spdif output ?
I don't have such settings on my very basic Presonus FireBox 1st gen...

nakedzen · Aug 1st 2013

Quote from lohworm

it was a setting on spdif output ?
I don't have such settings on my very basic Presonus FireBox 1st gen...

Nope, just the regular output volume. The Firebox should have a software mixer controller, check that the main output is set to 0dB on it.

pacocito · Aug 2nd 2013

With everything at 0dB, I get the same level than the first recording when reamping a direct track using spdif.

jpcesar · Aug 8th 2013

Quote from Joptunes

I use logic and will check when I get back home Friday. My reamp experience has been good to date. What audio interface are you using on your DAW?

im using native instruments komplete audio 6

laardi · Aug 19th 2013

Is it ok to have such a narrow looking waveform in the DI track? See the pic in post #3.

The waveforms of the DI tracks that I have been dealing with (not produced with spdif) typically almost hit the edge of the waveform bounding box.

KoMa · Aug 19th 2013

laardi: yes, nothing odd with it.

nakedzen · Aug 19th 2013

^What he said.

Generally having lots of headroom is good. I usually record with the peaks hitting around -8dB.

Trying to have a hot signal is a remnant of the analog era when noise was a problem.

KoMa · Aug 19th 2013

absolutely agree, less is waaay more when it comes down to tracking.

I think around -14dbfs (the volume shown in your DAW) equals 0 db on an analog desk, so that's something you should always keep in mind when tracking.

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