+',height='+Math.min(screen.height,726)+',location=no,toolbar=no,status=no,menubar=no,scrollbars=yes,resizable=yes');void(0); "E-MU 1212M - AudioFanzine")
E-MU 1212M 
strange noise with emu 1212m
[ E-MU 1212M ]
[ E-MU 1212M ]
Posts
surei01
2 posts | 1 Posted on 07/19/2006 at 22:39 Hi all, I have just installed an EMU 1212m sound card in my PC and am testing the output I am getting. What I find is a very low background noise at about -100dB (as expected and hoped) but I also find spikes at -80dB in perfectly regular intervals of about 3.5 ms (around 280 Hz). I do not see these spikes at all using a lower quality external (USB) audio interface (M-Audio transit, which shows a bckground noise at about -80 dB, but no spikes). Obviously something in my PC must be producing these spikes, but I do find the frequency quite unusual. Does anyone here have a clue what kind of device might have a switching frequency of about 280 Hz? My system is an AMD 64 X2 3800+ on a DFI n4-dagf (nforce-4) running XP32 Professional. I am using an Asus PCIe graphics board (nvidia 6200 GT chipset) and also have a satellite TV card in the PC, however, this is not active. Any help is appreciated! Thanks Reiner | ||
KitC
243 posts | 2 Posted on 07/20/2006 at 20:59 Are you using a SATA drive for your system drive? SATA drives in conjunction with the Silicon Image Sil 3112 sata controller on the mobo are known to cause problems with audio. | ||
surei01
2 posts | 3 Posted on 07/21/2006 at 22:52 HI, thanks for the reply. I identified the culprit, its the Sat-TV card. Don't know what the heck it is doing to produce these regular spikes, but taking it out of the system completely cures the problem. So may be an advice: don't put a Sat-TV card next to a highly sensitive AD converter. Best wishes Reiner | ||
KitC
243 posts | 4 Posted on 07/22/2006 at 05:42 Ha! I knew I saw your post somewhere... Glad to see you got it sorted out. |
