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Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: bluewingolive on July 12, 2008, 02:55:23 PM

Title: Mini MP -- Diagnosis anyone?
Post by: bluewingolive on July 12, 2008, 02:55:23 PM

I was doing some testing around the house w/ the MP.  I kept getting this strange buzz noise every time I touched the gain L or R.  It was audible and visible on the HDP2 meters.  I used household power and then switched to Li-on w/ same result.  Happened with two different sets of mics..C4s and AT4051's.  Connected to HDP2 w/ a set of Kindkables XRL interconnects.  I was monitoring w/ the phone jack on the HDP2.  Anyone ever encounter this?

Title: Re: Mini MP -- Diagnosis anyone?
Post by: OOK on July 12, 2008, 04:23:17 PM

Sounds like a grounding issue of some kind...

OOK

Title: Re: Mini MP -- Diagnosis anyone?
Post by: bluewingolive on July 12, 2008, 05:04:52 PM

let clarify...when I say touch ....I mean just grazing w/ my finger. 

Title: Re: Mini MP -- Diagnosis anyone?
Post by: datbrad on July 14, 2008, 09:16:59 AM

It could also be the headphones with the grounding issue. I would suggest you replicate the situation where you are hearing the buzz through the headphones. Record a min or two of it where you are monitoring it through the headphones while touching the gain knobs and getting the buzz. Then, unplug the headphones, hit record again, and touch the knobs again the same way for a min or so.

Then, playback both files to tell if you can hear the buzz. If you don't hear it at all on either file take, or you only hear it on the first file where you monitored with the headphones, you have your culprit.

 

Title: Re: Mini MP -- Diagnosis anyone?
Post by: headroom on July 22, 2008, 01:42:12 PM

Hi I have the same Issue but dont rembember AC or DV Power on the MP.