H. S. >> there is a constant hissing noise coming from the left speaker
The first thing you have to do is to get the chassis of the machine earthed properly, either via your power plug or 'crocodile-clipping' a good earth-wire to the chassis. Later you can screw on a pucca earth-wire. Isolate the speaker-out wire from the sound-card alone, see if the /hiss/ exists. If not go on connecting your peripheral cables and listen till it appears again. There are big ferrite beads available. Get a couple of beads through which you can pass the speaker cable. You need not cut the formed speaker wire/cable, just loop-string it at the sound-card pin end. If the hiss has stopped, good. >> guess this is a difficult one and I haven't been able to give more >> info Isolating the problem is a PITA but fixing it once isolated, is easy. ;) Hth. -- Ragu VU2RGU Free software is an attempt to use the 18th century principles for the encouragement of the diffusion of knowledge to transform the technical environment of human beings -- Eben Moglen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
