Doepfer

From: Florian Anwander <fanwander@mnet-online.de>
Subject: Re: [Doepfer_a100] Ground loop hum?
To: Doepfer_a100@yahoogroups.com
Date: Sunday, June 14, 2009, 3:08 PM











    
            
            


      
      Hi Peter



> If I plug headphones directly into a module's output then I don't hear it. When I plug the module's output into my audio interface, then I get the noise/hum. This is what leads me to believe it's a ground loop. Am I correct? If so, how do I remove it safely? A DI box with a ground lift feature?

I assume it is an interface, which is powered via the datacable from the 

computer. If i am right, then the solution will be either powering the 

interface via an separate powersupply, or connect the Doepfer to the 

computers interface via an passive DI split box (means ot 

electronically, but true split with a transformer) .



This problem happens very often with computers with separated LCD 

monitors (e.g. at our sessions it happes to two persons with Apple 

MacMini plus monitor), but also sometimes with laptops.



Florian


 

      

    
    
	
	 
	
	








	


	
	


      

[Non-text portions of this message have been removed]

> The audio interface has it's own power supply and is connected to my laptop via firewire.
> Unfortunately my laptop's battery has died so I always have it plugged into the mains supply too.
> On top of that, I have two monitors that are both connected to the mains & to the audio interface's main outputs.
> 
> So, I guess I'll try a DI box. Can you recommend any?
> 
> Thanks for your help guys!
> Pete

>
>
> Hello Peter,
>
> it depends on the quality requirements. Jensen are the best, Millenium
> from Thomann the cheapest, but ok for the amateur recordings.
>
> Florian
>
> PETER MARSHALL wrote:
>
>> The audio interface has it's own power supply and is connected to my
>> laptop via firewire.
>> Unfortunately my laptop's battery has died so I always have it plugged
>> into the mains supply too.
>> On top of that, I have two monitors that are both connected to the mains &
>> to the audio interface's main outputs.
>>
>> So, I guess I'll try a DI box. Can you recommend any?
>>
>> Thanks for your help guys!
>> Pete
>
>

From: Florian Anwander <fanwander@mnet-online.de>
To: Doepfer_a100@yahoogroups.com
Sent: Monday, 15 June, 2009 6:07:57 PM
Subject: Re: [Doepfer_a100] Ground loop hum?





Hi

> Bss Active DI boxes are extremely reliable. But maybe a bit too pricey.
He definitely needs a PASSIVE split box.

Florian

   

[Non-text portions of this message have been removed]

>
>
> Hi
>
>> Bss Active DI boxes are extremely reliable. But maybe a bit too pricey.
> He definitely needs a PASSIVE split box.
>
> Florian
>
>