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Problem with noise on inputs!!
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D,Rosengren
IsraTrance Junior Member
Started Topics :
14
Posts :
53
Posted : Sep 3, 2004 17:54
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Hello everyone!
I have a problem with noise!
I use a pci-soundcard(ESI waveterminal 192L)
The AD-converter should have a dynamic range around 100dB´s but i hav dynamic range around 78-80dB´s (very strange if u ask me).
So what the f**** is wrong??
I have tried to move the card to different pci-slots, changed grafic card and changed the power supply.. I have also disabled the onboard audiocard, pulled out the cd-rom and HD´s...
The noise dosent come from the mixer or any other hardware device, because the noise is there all the time even even when I pull out all the cables from the inputs and outputs....
So my last option is to by a new motherboard (I think it is a chaintech 7kjd) or a new audiointerface...
What do ju guys think is the card caput ore can it be somthing else that is "making" the noise????
Thanks!
/D |
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Trip-
IsraTrance Team
Started Topics :
101
Posts :
3239
Posted : Sep 3, 2004 18:16
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measuring dynamic range is not so easy - let them perform the checks 
If they said 100dB, that's prolly the maximum they achieved using optimal enviorment conditions.
and..... if you are getting a noise level of -80dB, I say it's pretty good.
 Crackling universes dive into their own neverending crackle...
AgalactiA |
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ZilDoggo
Started Topics :
4
Posts :
663
Posted : Sep 3, 2004 18:46
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the noise propably comes from you computer.,
actually there are a few possibilities.,
1) your card is badly/cheaply designed and will receive electromagnetic radiation from your computer,
2) your card is broken and cannot filter out the electromagnetic radiation.,
3) the drivers are bad or broken.,
was the problem always there?., or did it used to be better?.,
and i agree with trip., often a noise level of -80db is not so bad inside a computer.,
greets.,
aka., |
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D,Rosengren
IsraTrance Junior Member
Started Topics :
14
Posts :
53
Posted : Sep 3, 2004 19:24
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Hello! Tnaks for your answers!
ZilDoggo ist here any way to "shield out" the soundcard from electromagnetic radiation with some kind of plastic?? something like the protection plastic that soundcards etc have around them wen you buy them new?? A little silly but it may work ..
I dont kno if the problem was there from the beginning because i didnt record anything in the past...
I have tried many different drivers for the card withj no result. The company that makes them is konwn for good drivers (egosys) they also make drivers for st-audio and other...
So -80dB is good!? I thougt that was crap only 13,3 resolution.. may I ask how big your dynamic range is??
Maybe I should buy a firewire interface to get around the noise? |
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ZilDoggo
Started Topics :
4
Posts :
663
Posted : Sep 3, 2004 20:30
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i dont think i can advice on any shielding.,
i never heared of such a solution (maybe someone else?).
and this stuff also comes into the card through the pci interface., shielding doesnt help for that.,
i use a p4 2.8 on a MSI neo2 board
with 3 harddrives, ati vidcard (so there are some electrically heavy things in there)
i now use an e-mu 1212m.,
actually, this card is amazing.,
when i unplug the cables from my mackie 1202 desk (so the cables are still plugged into the card) i get about -108db (!!) in soundforge
when plugged in they are about -90db
so, altho my card has 24 bits resolution it only has about 18 bits above the noise floor (one bit is 6db of room) when recording or playing
-80db is very normal for 16 bits convertors., but it has to do with the electronics surrounding the actual convertors.,
some of this electronic is on the card and some is outside the card,.,
so it COULD be that your card is designed to have about -80db noisefloor., not sure.,
-80db is indeed about 13.33 bits of usefull space.,
but this should be fairly good.,
if you think about it,.
the more sources are in your mix the softer you have to make them to fit them into the dynamic range.,
so you will also soften the noise-floor.,
so if you mix your recording with, say, 7 other sounds then you put the noisefloor down by about 18 db (correct me if i'm wrong here).,
so it's not so bad,
unless you record everything through those inputs,.
also you have to watch out with compression as this will raise the noise floor.,
if you use a compressor you may want to put a gate or expander before it.,
anyway.,
not sure if a new mainboard will help., if you have another computer maybe you should try installing the card there and see if things change.,
greets.,
aka.,
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orange
Fat Data
Started Topics :
154
Posts :
3918
Posted : Sep 3, 2004 23:36
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sometimes computer fans can do the noises if they are not connected properly or connected with other devices in the same power suply or even not skrewed good and broken can cause noises in the audio interface chek this option to maybe its that sometimes mybe its close to your interface can cause noises to
orange
http://www.landmark-recordings.com/
http://soundcloud.com/kymamusic |
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