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Re:183-3 mod?

Re:183-3 mod?

2010-04-14 by zaum

>
> wondering if it'd be possible to swap out a resistor or something
> on the 183-3 to change the range from 1-4x loudness to 1-8x, 16 etc?
>
> i am trying to use it to raise a line level signal
> from my audio interface output (edirol fa-101)
> to a usable level within my a-100 system

Just a guess, apologies if you are certain you've ruled this out.

I would think many people would complain if that particular interface  
had super low output signals. I remember earlier on with my digital  
recordings I was just glad to see the amplitude bar moving and not so  
concerned that I was getting near the max (without clipping of  
course). Now if your digital signal going to the interface is pretty  
low to begin with, adding gain at the analog out won't make it up  
properly since you are also boosting all the digital artifacts making  
them more audible. 24-bit mode helps reduce that aspect, but you do  
want to get the strongest possible non-distorting levels at all  
points through the signal chain rather than a big boost at the end if  
possible.

Re:183-3 mod?

2010-04-15 by cera1210

hi nicholas,
i hadn't thought of using the 24 bit mode, 
which could help some... thanks for the tip :)

unforutnately, in my experience, any given signal coming out of the fa-101 
(no matter how compressed or even pushed to the point of clipping)
sounds weak when going into / out of the a-100 system 
compared to the level of the native a-100 oscillators.

so i'm curious if anyone else has had similar (or opposite) 
experiences with other audio interfaces?

i am thinking of picking up a fireface 400 & would be particularly curious to hear 
if anybody had experience feeding its outputs into an a-100 system...

cheers,
m



--- In Doepfer_a100@yahoogroups.com, zaum <zaum@...> wrote:
Show quoted textHide quoted text
>
> >
> > wondering if it'd be possible to swap out a resistor or something
> > on the 183-3 to change the range from 1-4x loudness to 1-8x, 16 etc?
> >
> > i am trying to use it to raise a line level signal
> > from my audio interface output (edirol fa-101)
> > to a usable level within my a-100 system
> 
> Just a guess, apologies if you are certain you've ruled this out.
> 
> I would think many people would complain if that particular interface  
> had super low output signals. I remember earlier on with my digital  
> recordings I was just glad to see the amplitude bar moving and not so  
> concerned that I was getting near the max (without clipping of  
> course). Now if your digital signal going to the interface is pretty  
> low to begin with, adding gain at the analog out won't make it up  
> properly since you are also boosting all the digital artifacts making  
> them more audible. 24-bit mode helps reduce that aspect, but you do  
> want to get the strongest possible non-distorting levels at all  
> points through the signal chain rather than a big boost at the end if  
> possible.
>

Re:183-3 mod?

2010-04-16 by cera1210

just a quick note to say that the 183-3 actually does a perfect job
bringing a single line out of the fa-101 up to the a-100's level --
the reason i was thinking i needed to modify it to bring up the levels 
was that i was using both inputs, which seems to cut the level in half,
perhaps because a circuit is being completed inside the 101?
not sure, but that's what happens.

at any rate, since those two inputs are actually just a 2-fold multiple, 
i can combine the signals internally to my computer with virtual patchcords
rather than with real wires in the physical world.

with a single input, the level seems to need to be at around 7 at 4x amplification, 
meaning there is actually still plenty of headroom in case i need to be more
heavy-handed or actually want to induce clipping for whatever reason. 

i imagine this would be the case for a number of other audio interfaces
as i was looking through the specs & both the edirol & the fireface have +4dBu outputs,
so this is probably the same for both, as well as other interfaces with +4dbU outs.

best,
mark


--- In Doepfer_a100@yahoogroups.com, "cera1210" <cera1210@...> wrote:
Show quoted textHide quoted text
>
> hi nicholas,
> i hadn't thought of using the 24 bit mode, 
> which could help some... thanks for the tip :)
> 
> unforutnately, in my experience, any given signal coming out of the fa-101 
> (no matter how compressed or even pushed to the point of clipping)
> sounds weak when going into / out of the a-100 system 
> compared to the level of the native a-100 oscillators.
> 
> so i'm curious if anyone else has had similar (or opposite) 
> experiences with other audio interfaces?
> 
> i am thinking of picking up a fireface 400 & would be particularly curious to hear 
> if anybody had experience feeding its outputs into an a-100 system...
> 
> cheers,
> m
> 
> 
> 
> --- In Doepfer_a100@yahoogroups.com, zaum <zaum@> wrote:
> >
> > >
> > > wondering if it'd be possible to swap out a resistor or something
> > > on the 183-3 to change the range from 1-4x loudness to 1-8x, 16 etc?
> > >
> > > i am trying to use it to raise a line level signal
> > > from my audio interface output (edirol fa-101)
> > > to a usable level within my a-100 system
> > 
> > Just a guess, apologies if you are certain you've ruled this out.
> > 
> > I would think many people would complain if that particular interface  
> > had super low output signals. I remember earlier on with my digital  
> > recordings I was just glad to see the amplitude bar moving and not so  
> > concerned that I was getting near the max (without clipping of  
> > course). Now if your digital signal going to the interface is pretty  
> > low to begin with, adding gain at the analog out won't make it up  
> > properly since you are also boosting all the digital artifacts making  
> > them more audible. 24-bit mode helps reduce that aspect, but you do  
> > want to get the strongest possible non-distorting levels at all  
> > points through the signal chain rather than a big boost at the end if  
> > possible.
> >
>

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