Not a newb - but having new-ish problems! HELP ME!

  • Thread starter Thread starter greenlightshow
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greenlightshow

New member
Ok, ok... so this isn't a traditional recording question; I actually run a podcast and recently purchased some new equipment... here's the story:

My previous setup sounded just fine. It wasn't spectacular, but I sure wasn't having the problems I'm having now. I don't like using just a firewire interface, as recording 5 simultaneous tracks individually isn't necessary and just wastes HDD space and resources on my computer. So I'm running the mains out from my mixer into two channels available on my firewire interface. This was working like a charm... on my previous setup.

So let's go over what's changed:

Previous Setup:
Mackie ProFX 8 running mains out to the first two channels available on a Presonus Firepod while using a headphone splitter cable from the headphone jack to run headphones to others on the show. Recording using Logic 9.

New Setup:
Mackie ProFX 8 running mains out to the two front inputs available on the brand new Presonus Firestudio Mobile using a Presonus HP4 headphone amp from the mains out of the Firestudio Mobile to run headphones to others on the show. Recording using Logic 9.

The Problem
Now, I'm getting a terrible, digital noise using the new setup. It's pretty loud and impossible to miss. When I plug a Mic directly into the Firestudio Mobile, everything sounds perfect. But when I plug the Mackie mixer back up to the Firestudio Mobile... all goes to hell. To me, this would indicate this issue lies somewhere in the mixer; some sort of power issue.

I need this noise GONE. It is terribly disturbing and I really hope someone here can help me with ANY advice.

Thanks!
 
The front connectors seem to be mic/instrument inputs. Try the back line inputs, and use balanced cabling.
 
You have a digital ground loop between the Firestudio and the mixer and/or computer. You need something like this. I deal with this all the time when recording live lectures.

Cheers
Alan.
 
Hey, thanks for the quick reply! I tried that, and I'm still getting a loud noise... it's not as aggressive as before (not as nasty) but still loud.
 
witzendoz said:
You have a digital ground loop between the Firestudio and the mixer and/or computer. You need something like this. I deal with this all the time when recording live lectures.

Cheers
Alan.
Click to expand...

I'll definitely give that a try. At this point I'll do ANYTHING!

Thanks!
 
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