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DI input buzz
Old 20th January 2013
  #1
Here for the gear
 
Tzvi's Avatar
 
🎧 5 years
DI input buzz

Hey guys, long time reader first time poster so here it goes. I've read all the posts I could find on here about a similar issue I've been having, however none of the solutions worked for me. Here's my problem:

I'm getting a buzzing on my DI input on my Mbox2 from my keyboard's line out. I'm using a 1/4" plug. So I've tried all the usual things: checking outlets, seeing if anything new is plugged in, unplugging to try and find the source, etc. Other electronics in the house won't affect it since I've got the studio on a separate line. Firstly, the buzzing is only there when that track (with the keyboard line into the DI) is record enabled. Second, it's also not always there. I've actually gone weeks without a problem, totally clean input sound. I tried figuring out if there's a certain time or day of the week, but honestly it's really random. I've also gone around the house, when I hear the buzzing, to try and identify anything else that might be causing it, like some electronics plugged in. It's not a humming so I don't think it's a grounding issue, it's more of a high pitched buzz (see below for link to sound). I've also tried recording hot onto the line to try and drown out the buzz, but any compression on the track reveals the buzzing. Other solutions I've tried have been: a frequency filter you click onto the cable to try and filter out the offending frequencies, someone suggested a Ground Loop Isolator from RadioShack - that actually made it worse! I've recorded for a few years with this issue, but just chose to record when the buzzing wasn't there. However, I'm tired of putting up with it and I want to make some music without this hindrance. Is there a product or solution you could suggest?

Here's the buzzing sound: DI input buzz by tzvimusic on SoundCloud - Hear the world’s sounds

Thanks for reading,
Tzvi
Old 20th January 2013
  #2
Lives for gear
 
🎧 10 years
Is the keyboard plugged into the same outlet as the computer and interface? Is the computer a laptop? Does the problem happen if you run the laptop on battery unplugged? What kind of cable, TS or TRS? Tried switching the cable?
Old 20th January 2013 | Show parent
  #3
Here for the gear
 
Tzvi's Avatar
 
🎧 5 years
Quote:
Originally Posted by rcb4t2 ➡️
Is the keyboard plugged into the same outlet as the computer and interface? Is the computer a laptop? Does the problem happen if you run the laptop on battery unplugged? What kind of cable, TS or TRS? Tried switching the cable?
Thanks for responding so quickly!

I'm running on a laptop and I've tried with them plugged into separate outlets and the same outlet, TS & TRS cables, and unplugging the laptop - all makes no difference.
Old 20th January 2013
  #4
Lives for gear
 
🎧 10 years
You're plugging into the wrong connector... Line outputs should go into the line input on the back. DI input is for bass or guitar. If you had the keyboard plugged into a DI, you'd then go into the mic input.

Try plugging your keyboard into the line input (right below the DI jack on the back) and see if your noise level goes down. I'm guessing it will.
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