Background noise!

[mojobone]

Sept 26, 2008, 7:59am, aimusic wrote:I do think he's talking about the general hiss you pick up from the pre in the firebox... I think anything over 12 starts to generate a hiss, the louder you get, the louder the hiss becomes, that's why I think he's gotta try and establish a decent level without having to boost the gain on the pre....It goes to twelve? That's one more than eleven, innit! If the knob's at twelve, maybe shop for a mic with lower self-noise and higher output. But since it appears the noise being heard isn't being recorded, it interferes with monitoring only, less of a problem, and as milfus said, easier to tackle. Probably a gain-staging issue.

[davekershaw]

Thanks all.No loose connections.Tried unplugging everything, and switched off nearby mains cables.Also turned off other computer.Speakers are set to full input.I'm getting the same problem through the headphones!Tried updating the firmware too.Main thing is, it's not recording the sound,so it's not so urgent.Will keep searching! Cheers,Dave.

[milfus]

yeah can you turn down the output from the fire box tho?

[davekershaw]

Sept 26, 2008, 9:37am, milfus wrote:yeah can you turn down the output from the fire box tho?Yeah, it's still there at lower volume.I'll live with it for now, as long as it's not recording.It really kicks in louder when I arm a track,but it's there on playback too.Will get to the bottom of it eventually.Cheers Milf.

[milfus]

aha, are you plugged into the same outlet/power strip?if not maybe re-organize that you areI am just goin down the list, we will get it

[mojobone]

It do begin to sound like a ground loop, don't it. Could also be a wall-wart picking up hum.

[davekershaw]

Sept 26, 2008, 10:04am, milfus wrote:aha, are you plugged into the same outlet/power strip?if not maybe re-organize that you areI am just goin down the list, we will get itNo, the Firebox is powered by the firewire bus.an' the hip bone's connected to the ... leg bone!

[milfus]

yeah im thinking emi, its not possible to move it to like the other side of the desk to test it is it?

[mojobone]

Try turning off bus power and use the wall-wart, then; that could be the culprit.

[davekershaw]

Sept 26, 2008, 11:24am, milfus wrote:yeah im thinking emi, its not possible to move it to like the other side of the desk to test it is it?I've tried moving it a couple of feet, as far as the cable allows,and there's no change at that.I will try disconnecting and relocating next.Unfortunately, I'll have to leave it until Monday now.Thanks for all your help.I'll post back Monday with the results.Have a great weekend.Dave.