Audio Interface to headphone amp noise

Hey guys,



My current sound setup is Mobo F/W → audio interface (m audio F/W Solo) Headphone Jack → Little dot MkIII amp → akg 702 headphones.



It seems the little dot is picking up noise from my pc (I’m guessing) via the audio interface. When I plug my headphones directly into the Audio interface, there is no noise. When I plug in a different source (ie ipod) to my headphone amp, there is no noise as well.



I’ve searched everywhere, and read the little dot’s own FAQ on the subject (which didn’t tell anything about solving my problem, just outlining it).



The only thing I can think of is using the dual 1/4 inch bal / unbal outputs in the back of the solo to the amp instead of the headphone jack, but I don’t have that cable right now to give it a shot.



Any Ideas on how I can rectify this problem? I’ve though of maybe buyign a standalone f/w card, or possibly a new audio interface (though this seems to me like it would suffer the same issue).



Thanks alot.

[quote]kquiring (18/08/2011)[hr]Hey guys,



My current sound setup is Mobo F/W → audio interface (m audio F/W Solo) Headphone Jack → Little dot MkIII amp → akg 702 headphones.



It seems the little dot is picking up noise from my pc (I’m guessing) via the audio interface. When I plug my headphones directly into the Audio interface, there is no noise. When I plug in a different source (ie ipod) to my headphone amp, there is no noise as well.



I’ve searched everywhere, and read the little dot’s own FAQ on the subject (which didn’t tell anything about solving my problem, just outlining it).



The only thing I can think of is using the dual 1/4 inch bal / unbal outputs in the back of the solo to the amp instead of the headphone jack, but I don’t have that cable right now to give it a shot.



Any Ideas on how I can rectify this problem? I’ve though of maybe buyign a standalone f/w card, or possibly a new audio interface (though this seems to me like it would suffer the same issue).



Thanks alot.[/quote]



sounds complicated…

what sort of sounds are you getting and how is it coming across? when you record mic in? line in?

Thanks for the reply Bryan,



I believe it is picking up noise from the pc (sounds similar to noise my laptop would pickup when I would plug earbuds / headphones into its integrated audio 8mm). The noise only starts when I open an application that uses sound on my mac (ie ableton, vlc player etc.). Someone on another forum suggested that it may be coming from the headphone amp output. And that I should use the unbalanced outputs at the back of my firewire solo (2x 1/4" to RCA), their reasoning being that the headphone port is a gain stage, thus putting the headphones through two separate gain stages.

I figure this is worth a shot, the little dot FAQ also recommends muting everything but .wav output but I’m not sure how to do this (if it is even possible) in mac.