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Hi!
Is it possible to enter with the guitar straight in the return of loop1 bypassing the first AD/DA,keep on using the other loops and hook my amp in the insert loop?
If yes:
do I need a buffer to do that or the loop's return match well with a guitar signal?
Thanks 
yes you can do that. You're best bet is to try it and see if you need a buffer that way.
Hi!
Is it possible to enter with the guitar straight in the return of loop1 bypassing the first AD/DA,keep on using the other loops and hook my amp in the insert loop?
If yes:
do I need a buffer to do that or the loop's return match well with a guitar signal?Thanks
You'll almost certainly need a buffer. The input impedance of the loop1/2/3/4 returns is not very high.
But then - as soon as you do that - you might as well put it in front of the G. It is not the AD/DA that causes ANY of the problems that folks here have. If you've been drinking the anti-digital cool-aid, you need to stop listening to the Jimmy Joneses out there.
Thanks to everybody....
I'm not going to use the comp nor filters, wah ect....that is why I want to skip the first AD/DA.
I know the g as very good converters and the tones problem comes from other issues
buy anyway a single conversion is better than two and since one of the two to me is not necessary I would like to skip it.:cool:
buy anyway a single conversion is better than two and since one of the two to me is not necessary I would like to skip it.:cool:
Actually - that's my point. You are wrong. It makes no audible sonic difference whatsoever, and as tough as the G-System input circuit CAN be for SOME users, it is almost always better to use that than a loop return. Do what you want - but please don't propogate this kind of anti A/D-D/A garbage to the rest of the world.
and it would be an horrible mistake not using the Filter effects and comp, they works very well...
I use a keeley comp and 95q cry baby and no need of filters and another compressor
If AD/DA conversion does not alter the sound of an amp why a lot of pro and not pro run their signals to line mixers to mantain their dry sound unaltered?
Like ..........Pete Thorn f.i.
Why does parallel fx loops exist?
Why does Killdry exist?
Bob Bradshaw?
The dry analog sound of an amp will always be better than a converted one even if you are using an eventide eclipse.
It is something you feel in the hands when you play and sometimes is clearly audible.
true that the differences are minimal with very good converters.
Some people hear/feel it some not.....I hear/feel it but I don't care because with the serial connection I can use all the fx,plus in a live situation these differences almost disappear......
Check this and their beautiful amps (english version of the website)
http://www.masottiamps.com/mxm_mixer.htm
Are they propagate garbage to the rest of the world?
I use a keeley comp and 95q cry baby and no need of filters and another compressor
If AD/DA conversion does not alter the sound of an amp why a lot of pro and not pro run their signals to line mixers to mantain their dry sound unaltered?
Like ..........Pete Thorn f.i.
Why does parallel fx loops exist?
Why does Killdry exist?
Bob Bradshaw?The dry analog sound of an amp will always be better than a converted one even if you are using an eventide eclipse.
It is something you feel in the hands when you play and sometimes is clearly audible.
true that the differences are minimal with very good converters.
Some people hear/feel it some not.....I hear/feel it but I don't care because with the serial connection I can use all the fx,plus in a live situation these differences almost disappear......Check this and their beautiful amps (english version of the website)
http://www.masottiamps.com/mxm_mixer.htm
Are they propagate garbage to the rest of the world?
It has nothing to do with A/D-D/A. It has everything to do with signal interfaces, impedance, and impedance interactions. The problem is that a lot of guitar gear is designed with crappy audio interfaces by people who are not audio engineers.
The parallel loop was a KLUDGE - created BEFORE digital devices became prevalent, to compensate for TWO stupid mistakes that would have been better solved other ways:
1) The use of passive (unbuffered) FX loops caused nightmares in signal quality when anything was put in an amp FX loop. That is "anything" - not "anythign digital". The high impedance output of the FX send combined with the capacitance of the cables connecting it to the pedals resulted in significant tone roll-off. Also, because the loop was unbuffered, the connected pedals would often load the gain stages of the preamp stage, causing a loss in gain as well. Combine those two things and you get a sonic disaster. You don't need digital for that.
So how did they respond to this? Did they correct their crappy loop designs? No. Instead they kludged them by saying "My loop design can't be bad - it must be the stuff in the loop. I'll blame it and then provide a way for some of the signal to bypass my crappy loop design inside the amp".
2) The use of vintage pedals (esp reverbs and delays), which had been designed for use BEFORE the amp input were being put in FX loops and this also caused problems. (This was, of course, operator error rather than amp designer error.) This resulted in unwanted sonic side-effects that would have been better handled by putting DIFFERENT pedals in the FX loop of the amp. In the interim, however, the parallel loop was a good way to deal with this.
Early AD/DA converters had audible sonic artifacts that were, indeed, not good. Almost NOTHING designed for pro audio and built in the last 20 years has this problem.
"Then why do I hear a difference when my signal goes through a digital device?" Because you expect to (and you may even want to if you have any tie-died inclinations).
As for devices between the amp and the guitar - ANY device, digital or not, placed between the guitar output and the amp input changes the interaction between the amp input stage and the guitar. This has NOTHING to do with digital.
The OP (original poster) is STILL proposing to put stuff between the guitar and the amp. The G-System FX loops are NOT passive, so the interaction between guitar and the amp input stage is already going to be changed. Adding in an A/D-D/A stage will change NOTHING as long as the gain staging (setting signal levels to maximize dynamic range and minimize noise) is done properly.
That told him! 
Thanks everybody for the informations
Converters today even in prosumer stuff you will hear no difference at all. 10 years ago maybe.