It is both computers causing the noise and it could be they are creating some sort of loop. I dont' know the technical term, but removing either does eliminate the noise. Like I said, just tweaking the mixer will generally remove or put the sound way in the background. So, it is not a really big deal, but I would like to understand what the cause is.
On Mar 2, 2009, at 7:46 PM, Trouble wrote: > The kvn shouldn't have a problem with that setup. however, if you > think it is, unplug it and see if hum goes away. That will tell for > sure if the laptop is doing it or the kvn. > > At 05:44 PM 3/2/2009, you wrote: > > >Hey folks, I have a rather interesting problem that I hope is > >acceptable for the list. Let me explain my setup and then I'll > explain > >the problem. > > > >I have a small mixer that has three or so inputs. I have my > employer's > >Dell laptop, my Macintosh, and a cable into which I plug my electric > >bass. All this is served by one pair of headphones. Now in order to > >save on space and so forth, I have a usb KVM switch. servicing both > >computers. THis KVM only handles a keyboard and mouse, but you could > >connect video, which I do not. So, when I have the Mac and PC laptop > >connected and running, everything is fine. If I shut the laptop lid/ > >put it to sleep, but leave it connected, I get this humming noise > that > >is not 60Mhz, but probably almost twice that. I can disconnect the > >laptop and then soud goes away or if I adjust the mixer controls just > >so, I can cancel out the sound. For some reason it sometimes gets > >messed up and that usually is because I have made a slight adjustment > >to something and then I have to start all over again isulating the > >sound by tweaking things. So, has anyone have any thoughts on how I > >might correct this problem, so I do not have to keeep messing with > the > >controls? It could be the mixer, but I suspect there is an issue with > >both machines being connected to the KVM and this is a pretty cheap > >KVM. The KVM is not near the computers, it is under my desk. > > > >Thanks, > > > > > > Tim > trouble > Verizon FIOS support tech > "Never offend people with style when you can offend them with > substance." > --Sam Brown > > Blindeudora list owner. > To subscribe or info: http://www.freelists.org/webpage/blindeudora > > [Non-text portions of this message have been removed]
