I'm trying to hook Line Out of SB32 PnP card with stereo to
hear MP3s through big speakers. OK, so I picked long cable
and did it so. I get sound, but also a constant background
noise on low frequencies (stereo's equalizer shows 10 Hz and
100 Hz). Noise continues even computer is turned off. When I
pull out from SB cable, noise stops (so this is not shielding
problem), and sound is good even if I connect cable to Sony
Walkman. Computer is grounded OK (I believe).
What I'm gonna do ?