| darkfenriz |
Hi all
I have feed my amplifier directly from integrated 5HI+ low quality sound card I have now (thinking of "M-Audio audiophile" of "Audiotrak-Maya" in future when I have some spare monay).
The results are quite frightening.
Here are my observations and impressions:
1. There is some low frequency noise (not mains hum) and it gets more intensive when different devices do things. Seems to me that it happens when HDD, DVD-ROM or mouse or something else generate interruptions to prosessor. Is it related to supply? Or faulty ground sheme? Or maybe high clock jitter caused by supply changes?
2. High frequencies intermodulate with their mirror images over 22050Hz causing audible products. It is not directly hearable as intermodulation effect when listernig to classical/jazz/rock, but it gets pretty obvious with some ambient/darkwave music with much content above, say 17kHz, some pure tones and synthetic noises clearly reveal this. I heard this when playing Norwegian band "Ulver" , "Perdition City" album. By the way beautiful music, isn't it?
:cool:
I guess it heavily degrades every music not band-limited, not as a pure effect, but general degradation and false reproduction.
Is this a question with more sophisticated sound cards with better interpolation and filtering? Is this an issue with digital sources in general? Oversampled or non-oversampled does make any difference as far as this effect is concerned?
Comments most welcome
best regards
Adam |
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| Leolabs |
1)This due to mainly grounding problem as I'm using a CD-ROM as my CD player which is inducing some noise on my amp.
2)Seem it is a cheap sound card,the design itself is the problem. |
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| darkfenriz |
| Don't you think junk equipmnt. gives lights to some points about better one? |
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| DoomPixie |
i had similar problems sometimes.. if i used the wheel on the mouse i got an annoying clicking sound through my soundcard.. and i use an m-audio delta 1010.. I reorganised the cables at the back of the PC and no more problems, Mouse and keyboard are both plugged into front USB sockets now aswell to keep the cables away from the audio cables at the back..
Owen |
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